Looking to mix 2 things together to equal 100%

Question

I need to find 100%. Let's say I am mixing sugar and flour. How many grams of sugar would 100g of flour need?

I want the 100g of flour to make up 40% of the mixture.

How many grams of sugar will I need for the remaining 60%?

Answer 1

You could use a proportion for this. $$\frac{100g}{x}=\frac{40%}{60%}$$ Solve and we have $$x=150$$ So, you need 150 grams of sugar in this mixture.