Sonia spent 1/4 of her gym practice time on the trampoline. Then she spent 1/2 of the remaining time on the balance beam. What fraction of her gym practice time did Sonia spend on the balance beam?

Avery’s piggy bank has 300 nickels, 450 pennies, and 150 dimes. she randomly picks three coins. each time she picks a coin, she makes a note of it and puts it back into the piggy bank before picking the next coin.