5.2 cup is the same as 65% of what number
Now let's put that into math:
5.2 = 65% of n
5.2 = .65n
Divide both sides by .65 to get n by itself
5.2 = .65 n
.65 .65
n= 8 cups in this batch of salsa
Notice that dividing by .65 (a number less than 1) made the 5.2 actually increase to 8. Division does not always make thing smaller.