in a public show 75 % of the seats were filled . if there were 600 seats in the hall , how many seats were vacant ?
"75 % of 600 = 75 / 100 × 600 = 450 therefore , the number of vacant seats = 600 - 450 = 150 . answer : e"
divide(multiply(600, subtract(const_100, 75)), const_100)