Rick started with 10/10 of the grapes because he had all of them at the start.
Then he gave 2/10 and 4/10 of the grapes away.
10/10 - 2/10 - 4/10 = 4/10 = 2/5 left
answer: Rick had 2/5 of the grapes left.
The second one is bigger as the square is a even number with the negative whole
2: 17.5 years. Work; 12 months in one year, 210 months divided by 12 months= 17.5 years.