Question

after spending 70 percent of his income and giving 10 percent of the remainder to the charity john has rs5400 left with him . find his income

Answer 1

let income are x Rs
than 70 %income
(70/100) +(10x/100)=5400+x
(70+10x)/100=5400+x
(70+10x)/10=54000+10x
7+x=54000+10x
9x=539993
x=539993/9
x=59999.22 rs
I income will be 59999.22