One serving of granola provides 4% of the protein you need daily. You must get the remaining 48 grams from other sources. How many grams of protein do you need daily?

Question

(show the equation plis)

Answer 1

Hello Maria,

You can solve this equation through cross multiplication. To start, let's define our unknown variables:

grams of protein in granola bar = x

total grams of protein needed daily = 48 + x

4% as a fraction = 4 / 100

We know that the granola bar provides 4% of our daily protein needs, so we can set up this equation:

x 4

____ = _____

(48 + x) 100

Cross multiply these fractions: (100 * x) and (48 + x) *4 :

100x = 192 + 4x

Subtract 4x from both sides:

96x = 192

Divide both sides by 96:

x = 2

We now know that there are 2 grams of protein in the granola bar. Knowing that we need an additional 48g protein daily, we add 48 + 2 to find that we need 50 grams protein daily. To double check this, divide 2 / 50 to find that it does indeed equal 0.04, or 4%. This confirms that the granola bar has 2 grams of protein and was indeed 4% of our daily protein needs.

I hope this helped!