Lizzy: John decides to fix a racecar. It cost $20,000 to fix but he gets a 20% discount. He wins his first race but only keeps 90% of the money. The prize is $70,000. How much money did he make from the car?.
Me: Hmmm, let me think. I think this is the detailed solution:
He gets a 20000 * .2 = $4000 discount. So he paid 20000 - 4000 = $16000. He kept 70000 * .9 = $63000. So he made 63,000 - 16,000 = $47,000. Final answer: 47000.