Question

There are 48 calories of energy in 40g of rice. How many calories are in 160 g of rice?

Answer 1

It is 48 times 4 so it is 192

Answer 2

160 grams of rice is four times larger than the given 40 g. 
So the number of Calories must be 4 times larger too. 

48 x 4 = 192 Calories in 160 g of rice