divide 25kg in in a ratio of 2:3:5
Add the ratios.. 2+3+5 = 10 Then divide 25kg by 10 and you will get 2.5 Multiply your ratio figures by 2.5 so it would be (2.52) : (2.53) : (2.5*5) Making your answer 5 : 7.5 : 12.5
