Question

find your weight if your friend weighs 20% more than you and your friend weight is 48 kg

Answer 1

Let your weight be x

Your friend's weight is x + 20x/100 = x + x/5 = 6x/5

Your friend's weight is 48kg

So 6x/5 = 48

x = 48 x 5/6 = 40 kg