0.41 / 10.20 = 0.040.....multiply by 100 to get ur percent = 4%
18 - 2H = 12 - .5H
Combine the variables
18 - 2H + .5H = 12 - .5H + .5H
18 - 1.5H = 12
Combine the whole numbers
18 - 18 - 1.5H = 12 - 18
-1.5H = -6
Divide by -1.5
-1.5H/-1.5 = -6 / -1.5
H = 4
The answer is 4 hours
You take 67.8/100×15
10.17
then take 15-10.17 the answer will be the wrongs u got
=4.83