Write the sales tax rate as proper fraction tax rate = 16.5/330
simplify the proper fraction, divide the numerator and denominator by 16.5 tax rate = 16.5/330 tax rate = 1/20
Change the proper fraction into percentage Percentage means per hundred. We only have to change the denominator into 100 by multiplying the denominator by 5. If the denominator is multiplied by 5, so is the numerator tax rate = 1/20 tax rate = (1 × 5) / (20 × 5) tax rate = 5/100 tax rate = 5%
