40% of ? =240

Find 40% of 60.

40% of 250 km is __________.

40% "of" 250=50% "of" ?

40% of 200-20% of 50_____________

40% of [ 100 – 20% of 300] is equal to

if 20% of a and 40% of b is 230 and 40% of a and 20% of b is 190 ,then b is what percentage more or less than a ?

Solve: x-40% of x=12 .