Question

if a pound of almonds cost eight dollars how many ounces can be bought for $3.80

Answer 1

Proportions

A pound of almonds is said to cost 8 dollars.

But one pound is equivalent to 16 ounces, therefore:

16 ounces cost 8 dollars

Dividing by 8 we get that

2 ounces of almonds cost 1 dollar

Thus, for $3.80 we can buy 2*3.80 = 7.60 ounces of almonds