Question

the income of minor increased by 10% every year is is present annual income is 880000 what was his income one year earlier

Answer 1

Let his Income last year be=X rupees
Every year increase=10%
Now his income=880000

(Suppose you have Last year you earned 5 rupees now you earned 10% more what you will do just add.)
so,
X+(x×10%)=880000
X+(X/10)=880000
LCM=10
11x/10=880000
X=880000×10/11
X=800000
So income last year was =800000rupees