Question

The ratio on a key board of number keys to letter keys is 3:15. If a manufacturer produced 156 letter keys,then how many keys would need to be produced?

Answer 1

Answer: Approximately 31 number keys.

Step-by-step explanation: Ratio is a comparison between two values.

Ratio for number keys to letter keys is $\frac{3}{15}$, which means each 3 group of number keys is equivalent to 15 letter keys.

The producer will need

$\frac{3}{15} =\frac{x}{156}$

$x=\frac{3.156}{15}$

x = 31

The manufacturer will need to be produced 31 keys.