Question

Approximately 3 people out of every 30 are left handed. About how many left handed people would you expect in a group of 140 people?

Answer 1

We can set this up by saying:
3 / 30 = x / 140 now we can solve!
1 / 10 = x / 140
x = 140 / 10
x = 14

Hope this helps! :)