I do not know the formula to solve this word problem:
The recipe called for oatmeal and raisins in the ratio of 8 to 7.
If 3 cups of oatmeal were called for, how many cups of raisins were needed?
Thanks to anyone who can help me.
if we wrote the amount of oatmeal as a fraction of the whole, it would be 8/15. similarly, if we wrote the amount of raisins as a fraction of the whole, we would write 7/15.
now let the number of cups of raisins needed be r. we must have that:
an alternative meathod would be to let the whole be x, since the fraction of the whole that is oatmeal is 8/15 we must have:
Let be the cups of raisins needed. Since the fraction of the whole that is raisins is 7/15, we must have