Here's one:
One serving of oatmeal provides 16% of the fiber you need daily. You must get the remaining 21grams of fiber from other sources. How many grams of fiber should you consume daily?

Respuesta :

16% - x grams
84% - 21 grams

16:x = 84:21
84x = 16×21
4x = 16
x = 4

One should consume 21 + 4 = 25 grams of fiber daily.