How many kilograms of grapes would be required to produce 54 kg of raisins if the grapes contain 90%

How many kilograms of grapes would be required to produce 54 kg of raisins if the grapes contain 90% water and the raisins 5% water?

To solve this task, remember, in order to find the number by its part, expressed as a fraction, you need to divide this number by a fraction. Knowing that grapes contain 90% water, and raisins 5% water, we calculate what percentage of grapes are raisins.
100 – 90 + 5 = 10 + 5 = 15%.
Let’s translate the percentages into parts.
15% = 15/100 = 0.15.
Let’s calculate how many kilograms of grapes it will take to get 54 kg of raisins.
54: 0.15 = 360 kilograms.
Answer: 360 kilograms.