Question

in an office building 120 offices are currently being rented this represents 80% of the total units how many offices are there in the building

Answer 1

There are 150 offices.

Answer 2

$x \times 80\% = 120 \\ x = 120 \div \frac{80}{100} \\ x = 120 \times \frac{100}{80} \\ x = 150$

There are 150 offices in the building.

Hope this helps. - M