Question

A painter uses 2 tubes of black paint for every 6 tubes of white paint to paint a mural.At that rate, how many tubes of black paint are used if 15 tubes of white paint are used?

Answer 1

For 14 tubes of black paint 42 tubes of white paint are needed.
The to get the extra tube you have to think that half of 2 is 1 and half of 6 is 3 .
so you add 3 and 42 and you get 45