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