What's 75 percent I haven't come up with this problem for a long time! Depressed! This is a matter of time. When is 75%? I think it should be solved according to the formula!

What's 75 percent I haven't come up with this problem for a long time! Depressed! This is a matter of time. When is 75%? I think it should be solved according to the formula!

75 min = 1.25 H = 125% H