Jake and his friends all wanted to hang out at the movie theaters. Jake and his friends arrived and he brought $10.00 to pay for himself just in case.
Mark goes to the store
Oh did you know if you buy a pineapple you get another one 70% off?
Jake arrived at the movie theaters and had to pay for himself. The ticket cost him $9.00 but it decreased to $8.25. Then Jake asked himself why it decreased. Until he found the answer.
He is offered another pineapple
Let me check how much money I have
Jake figured out the percent change by subtracting $9.00 and $8.25 and he got 0.75. Then since it is decreasing, he then divided by the original amount $9.00 then its 83%. After that Jake and all his friends have a lot of fun enjoying the theaters.
He has enough money
Mark is out shopping and finds a pineapple for $4.00. He is offered to buy another one for 70% off. He needs to see if he has enough money to buy the extra pineapple for his fruit cocktail.
Mark checks how much money he has and he has $6.78. He feels like he has enough money. He doesn't know how much the pineapple is now so he asks the cashier but the cashier said he was old enough to figure that out.
Mark didn't know until he knew what to do. At first, he turned 70% into a decimal which is .70. Then, he multiplied that by 4.00 and he got 2.80. Next, he subtracted 2.80 from 4.00 and got his answer. (The answer is $1.20.)