Ann increased the quantity of all the ingredients in a recipe by 60%. She used 80 grams (g) of cheese. How much Cheese did the recipe require?

So to use an equation to find it, we have to find the missing number.
1.6x=80
Now divide:
80÷1.6= 50
Let's check to see if we're right.
50×.6= 30+50= 80
So they required 50 grams of cheese.