Harris sold 8 cats, 5 hamsters and some birds. He sold 7 more birds than hamsters. What fraction of the total number of animals sold were hamsters?

Harris sold 8 cats, 5 hamsters and some birds. He sold 7 more birds than hamsters. What fraction of the total number of animals sold were hamsters?

Given,

Harris sold 8 cats, 5 hamsters and some birds.

He sold 7 more birds than hamsters.

He sold total birds = 5 + 7 = 12

so hamsters were,

= `"5"/"8+5+12)"`

= `1/5` of all the animals