One brand of horse feed is made of oats and barley. The ratio of oats to barley is 4 : 11 by mass. How many kilograms of each grain are needed to make 150 kg of feed? (Show your thinking)

Below in bold.

Step-by-step explanation:

Fraction of oats = 4/(4+11) = 4/15

So fraction of barley = 11/15

Weight of oats in 150 kg = 150 * 4/15 = 40 kg

and there are 110 kg of barley,

Step-by-step explanation:

Fraction of oats = 4/(4+11) = 4/15

So fraction of barley = 11/15

Weight of oats in 150 kg = 150 * 4/15 = 40 kg

and there are 110 kg of barley

109 is the nearest whole number/final answer! : )