Percy wants to save up for a new PlayStation, which costs $500. He gets $200 on his birthday and $150 at Christmas. To make the rest of the money, he's going to sell his old PlayStation games for $7.5 each. How many games does he need to sell to reach his goal?

He needs to earn $150 more dollars because 500 - 200 - 150 =

<<500-200-150=150>>150 He needs to sell 20 games because 150 / 7.5 = <<150/7.5=20>>20 #### 20 Jason spent 1/4 of his money and an additional $10 on some books. He then spent 2/5 of the remaining money and an additional $8 on some DVDs. If he was left with $130, how much money did he have at first? Let X be the money Jason had at first. Jason spent 1/4*X + 10 on books. Jason spent 2/5*[X - (1/4*X + 10)] + 8 on some DVDs. Jason has X - (1/4*X + 10) - {2/5*[X - (1/4*X + 10)] + 8} = $130 left. X - 1/4*X - 10 - 2/5*X + 1/10*X + 4 - 8 = $130. 9/20*X - 14 = $130. X = $<<320=320>>320. #### 320 Kiki made 10 cucumber sandwiches and 8 egg sandwiches for the tea party. Each cucumber sandwich was cut into 4 triangles. Each egg sandwich was cut into 2 rectangles. If her guests ate 28 triangles and 12 rectangles, how many slices of bread did they eat? The guests ate 28 / 4 = <<28/4=7>>7 cucumber sandwiches. The guests ate 12 / 2 = <<12/2=6>>6 egg sandwiches. They ate a total of 7 + 6 = <<7+6=13>>13 sandwiches. They ate a total of 13 x 2 = <<13*2=26>>26 slices of bread. #### 26 Carolyn counts 6 monkeys and 6 birds in the tree outside her window. Then two of the monkeys each eat one bird. What percent of the animals outside her window are monkeys now? First find the new number of birds: 6 birds - 2 birds = <<6-2=4>>4 birds Then find the new total number of animals: 6 monkeys + 4 birds = <<6+4=10>>10 animals Then divide the number of monkeys by the number of animals and multiply by 100% to express the answer as a percentage: 6 monkeys / 10 animals * 100% = 60% #### 60 Every day, Billie bakes 3 pumpkin pies for 11 days and puts them in the refrigerator. It takes 2 cans of whipped cream to cover 1 pie. If Tiffany comes over and eats 4 pies, how many cans of whipped cream does Billie need to buy to cover the remaining pies? In total Billie bakes 3 x 11 = <<3*11=33>>33 pies. After Tiffany eats the pies, this many pies are in the refrigerator: 33 - 4 = <<33-4=29>>29 pies. She needs to buy this many cans of whipped cream 29 x 2 = <<29*2=58>>58 cans. #### 58 A chocolate box contains 200 bars. Thomas and his 4 friends take 1/4 of the bars and decide to divide them equally between them. One of Thomas's friends doesn't like chocolate bars very much and returns 5 of his bars to the box. Later, his sister Piper comes home and takes 5 fewer bars than those taken in total by Thomas and his friends so she can also share with her friends. What's the total number of bars left in the box? Thomas and his friends took 1/4*200 = <<1/4*200=50>>50 bars. The total number of bars left in the box was 200-50 = <<200-50=150>>150 bars. Since there are five of them sharing, each of them got 50/5 = <<50/5=10>>10 bars. After a friend returned 5 bars, there were 150 + 5 = <<150+5=155>>155 bars in the box. Piper took five fewer bars, that is 50 - 5 = <<50-5=45>>45 bars. The total remaining bars left in the box is 155 - 45 = <<155-45=110>>110 bars. #### 110 Kendra baked cookies for her family. Each batch contains 12 cookies. His family has 4 total people. She made three batches. Each cookie contains 2 chocolate chips. How many chips does each family member eat if they all get the same number of cookies? She made 36 cookies because 12 x 3 = <<12*3=36>>36 These contain 72 chocolate chips because 36 x 2 = <<36*2=72>>72 They each get to eat 18 chocolate chips because 72 / 4 = <<72/4=18>>18 #### 18 Chris’s internet bill is $45 per month for 100 GB and $0.25 for every 1 GB over. His bill for this month is $65. How many GB over was Chris charged for on this bill? Let G stand for the number of GB billed, so the total bill is $0.25G + $45 flat rate charge = $65 total bill. Now we will solve for G. $0.25G + $45 flat rate - $45 = $65 -$45. This simplifies to $0.25G = $20 $0.25G/$0.25 = $20/$0.25 G = 80 GB were charged on this bill. #### 80 Rex is taking lessons for his driver’s license. He wants to take 40 hour-long lessons before his test, and decides to have two-hour sessions twice a week until he has done his test. After 6 weeks, how many more weeks will Rex need to continue taking lessons to reach his goal? Each week, Rex is taking 2 hour-long lessons * 2 times a week = <<2*2=4>>4 lessons. After 6 weeks, he has done 4 lessons per week * 6 weeks = <<4*6=24>>24 lessons. So Rex still needs 40 total lessons – 24 lessons taken = <<40-24=16>>16 lessons. He will therefore need lessons for another 16 lessons / 4 lessons per week = <<16/4=4>>4 weeks. #### 4 Layla is feeding her pet fish. She has two Goldfish which each get one teaspoon of fish food. Her 3 Swordtails each get 2 teaspoons of food. Her 8 Guppies each eat half a teaspoon of food. How much food does she have to give to her fish in total? The two Goldfish eat a total of 2 * 1 = <<2*1=2>>2 teaspoons of food. The 3 Swordtails eat a total of 3 * 2 = <<3*2=6>>6 teaspoons of food. The 8 Guppies eat a total of 8 * 1/2 = <<8*1/2=4>>4 teaspoons of food. In total, all of her fish eat 2 + 6 + 4 = <<2+6+4=12>>12 teaspoons of fish food. #### 12