Question

45 is what percent of 72?

16%?

Answer 1

SInce 45 is the part, and its percentage is unknown, let's call the unknown percentage x.
72 is the whole amount, so it is 100%.

Now we can set a proportion.
45 is to x percent as 72 is to 100 percent.

\(\dfrac{45}{x} = \dfrac{72}{100} \)

Now cross multiply and solve for x.

Answer 2

45x72= 3,240?

Answer 3

Cross multiply means this: