Ok i need a little help. I have the answer to this question but i need to know how the teacher got the answer.

How many grams of water are in a 100g of a 30% sugar solution? My answer is 70.

if thirty percent is sugar, then 70 percent is water.

What is 70 percent of 100?

70

To determine how the teacher arrived at the answer, let's go through the calculation together.

We have a 30% sugar solution, which means that 30 grams of sugar are dissolved in every 100 grams of solution. Since the total weight of the solution is 100 grams, the remaining weight is attributed to the water.

To find the amount of water, we subtract the weight of sugar from the total weight of the solution. Here's the equation:

Weight of water = Total weight of solution - Weight of sugar

Weight of water = 100 g - (30 g) = 70 g

Therefore, the teacher got the answer of 70 grams of water in a 100g solution. Your answer is correct!