You lose one quarter, two dimes, and two nickels.

a. write the amount as a decimal.

b. write the amount as a fraction in simplest form

To answer this question you need to know how much is a quarter ($0.25), a dime ($0.10) and nickel ($0.05) worth. Then, the total money he lose would be:

1 ($0.25) + 2 ($0.10) + 2 ($0.05) = $0.25 + $0.20 + $0.10 = $0.45

The decimal form would be $0.45

The fraction form would be (45/100) / (5/5) = 9/20