To raise a term with an exponent to another exponent, retain the base and multiply the exponents:

In order to find how many additional workers are needed to staff the extra crews you first need to calculate how many workers are on a crew. There are 12 workers at the company now and that's enough to staff 3 crews so there are \( \frac{12}{3} \) = 4 workers on a crew. 5 crews are needed for the busy season which, at 4 workers per crew, means that the roofing company will need 5 x 4 = 20 total workers to staff the crews during the busy season. The company already employs 12 workers so they need to add 20 - 12 = 8 new staff for the busy season.

By buying two shirts, Frank will save $25 x \( \frac{5}{100} \) = \( \frac{$25 x 5}{100} \) = \( \frac{$125}{100} \) = $1.25 on the second shirt.

So, his total cost will be
$25.00 + ($25.00 - $1.25)
$25.00 + $23.75
$48.75

To divide fractions, invert the second fraction and then multiply:

\( \frac{4}{5} \) ÷ \( \frac{3}{7} \) = \( \frac{4}{5} \) x \( \frac{7}{3} \)

To multiply fractions, multiply the numerators together and then multiply the denominators together:

\( \frac{4}{5} \) x \( \frac{7}{3} \) = \( \frac{4 x 7}{5 x 3} \) = \( \frac{28}{15} \) = 1\(\frac{13}{15}\)

The least common multiple (LCM) is the smallest positive integer that is a multiple of two or more integers.