The number 75 is decreased by 40%, then the result is again decreased by 20%.
What is the final result?
To decrease a number by 40% multiply it by 0.6 (60% = 100% - 40%).
To decrease a number by 20% multiply it by 0.8 (80% = 100% - 20%)
So result = 0.8*(0.6*75) = ... you can crunch the numbers.
