The mass of raisins is 56% of the mass of grapes. How many grapes do you need to take to make 14 kg of raisins.

Let us denote the mass of the grapes by the parameter x.

In order to calculate a particle from an integer, we give percentages in our condition. We will transform them.

Then the mass of raisins can be written as 0.56 * x.

Raisins weight 14 kg.

0.56 * x = 14;

x = 25.

Answer: you need to take 25 kilograms of grapes to get 14 kg of raisins.