Question

Henri made 40 brownies. This is 25% of the brownies he must make. How many brownies must he make?

Answer 1

answer: henri must make 160 brownies.

work:

set up as a system of equations.

$\frac{40}{x}$ = $\frac{25}{100}$

now, cross multiply to solve.

25(x) = 40(100)

25x = 4,000

now divide 4000/25.

4000/25 = 160.

40 is 25% of 160, so he must make 160.