Jill fish weight 8 times as much as her parakeet. Together they weigh 63 ounces how much does Jill fish weigh

Fish + parrot = 63 ounces

The task can be formulated differently. Weight is one fish and one parrot. We take fish scales. Instead of fish we put eight parrots. Weight will not change. So nine parrots weighs 63 ounces. One parrot is 1/9, and one fish is 1 - 1/9 = 9/9 - 1/9 = 8/9

1/9 + 8/9 = 100% 63 ounces

63 ounces * 1/9 = 7 ounces parrot

63 ounces * 8/9 = 56 ounces fish