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?

Approximately 31 number keys.

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

Ratio for number keys to letter keys is , which means each 3 group of number keys is equivalent to 15 letter keys.

The producer will need

x = 31

The manufacturer will need to be produced 31 keys.

c

step-by-step explanation:

c