Question

Ben can do 50 sit-ups in 3 minutes. At that rate, how many sit-ups can he do in 12 minutes?

Answer 1

Ben can do 200 sit-ups in 12 minutes.

Answer 2

the best way to do this is to set up a proportion

50 x
---- = ----
3 12

then cross multiply and divide ( 50 times 12) / 3= 200

he can do 200 situps in 12 minutes