Answer
$20 g$
Work Step by Step
Let's set up a proportion to compare the number of calories present in a certain number of grams of crackers:
$\dfrac{80 C}{16 g} = \dfrac{100 C}{x}$
Cross-multiply to eliminate the fractions:
$(80 C)(x) = (16 g)(100 C)$
Multiply to simplify:
$80x = 1600$
Divide both sides by $80$:
$x = 20$
There are $20 g$ in that package of crackers.
