Answer :
The answer is 40.74kg because you divide my 100, multiply by three ad subtract from 42!
42 = 100%
1%= 0.42kg
0.42 x 3 = 1.26
1.26= 3%
42-1.26 = 40.74
Ans= 40.74kg
1%= 0.42kg
0.42 x 3 = 1.26
1.26= 3%
42-1.26 = 40.74
Ans= 40.74kg