Question

A chocolate chip cookie recipe asks for one and one quarter times as much flour as chocolate chips. If three and five eighths cups of flour is used, what quantity of chocolate chips would then be needed, according to the recipe?

Answer 1

`2.9` (`=2 9/10`) cups of chocolate chips

Explanation:

One and a quarter `= 5/4`

So the recipe calls for
`color(white)("XXX")5/4` cups of flour for each `1` cup of chocolate chips:
or
`color(white)("XXX")4/5` cups of chocolate chips for each cup of flour.

So `3 5/8 =29/8` cups of flour would need
`color(white)("XXXXXXXXX")29/8xx4/5 =29/10=2.9` cups of chocolate chips