Question

a+b+c+d=345. b=80%din a ; c=3/4dinb;d=3/5 din c a,b,c,d= ?

Answer 1

a+b+c+d=345
b=80%a =80a/100=4a/5
c=3b/4=3/4 ×4a/5=3a/5 
d=3c/5=3/5 ×3a/5 =9a/25
a+4a/5+3a/5+9a/25=345
25a+20a+15a+9a=8625
69a=8625
a=125
b=125×80%=100
c=3b/4=3×100/4=75
d=3c/5=3×75/5=45