Answer: 14.7 grams of fat.
Step-by-step explanation:
The data we have is:
1g of sugar contains 4 cal
1g of fat contains 9 cal.
Let's define:
S = # of grams of sugar.
F = # of grams of fat.
We know that:
A serving has 160 calories:
S*4cal + F*9cal = 160 cal.
S = 7.
Then we can replace the second equation into the first one, and get:
7*4cal + F*9cal = 160cal
F*9cal = 160cal - 28cal = 132 cal.
F = 132cal/9cal = 14.66...
Now we want to round it to the first decimal place, the next decimal after it is a 6, so we must round up.
F = 14.7
This means that the serving has 14.7 grams of fat.
