Question

In 2005​, about 5 billion gal of renewable​ fuels, such as ethanol and other​ biofuels, were used in the United States. The energy law passed in 2007 requires that 35 billion gal of such fuels be used by 2022. What is the percent of​ increase?

Answer 1

11.11
5/45 = x/100 (reduce fraction to lowest terms to make it easier to work with)
1/9 =x/100
.1111 = x/100
.1111x100 = x
11.11 = x