Question 599760
Solve how many dollars is 16 quarters. 

16(0.25 cents) = 4 dollars

Now you know 1 dollar is 10 dimes (0.10 cents)

If you have 4 dollars and 1 dollar is 10 dimes solve how many dimes in 4 dollars.

10 dimes * 4 = 40 dimes

40 dimes = 16 quarters