Question

Mr arun earns R5500 per month he spend 70% for household expenses 25% on children and saves the rest how much money did Arun save?

Answer 1

for household = 70/100 . 5500 = Rs. 3850
,,    children    =  25/100 . 5500 = Rs. 1375
total expenditure = 3850+1375 = Rs. 5225
savings = 5500 - 5225 = Rs. 275

Answer 2

Method 1. (long method)
household expenses = (70/100)×5500 = RS 3850
on children = (25/100)× 5500 = 1375
money saved = income - total expenses
                       = 5500 - ( 3850 + 1375) 
                       = 5500 - 5225
                       = 275
money saved = Rs 275

Method 2 ( simplest )
total expenses = 70% + 25%
                        =95 % 
means, Mr Arun saved (100 -95)% = 5%
so, 5 % of Rs 5500 = (5/100)×5500
                                = Rs 275