Income and expenditure concept

**Problem 1:** A person spends 40% of his salary on house rent, on remaining 10% spends on travels, on remaining % spends on food and remaining is saved. If he saved RS 6750 what amount he spent on food?

Solution : Assume total income=100

40% spends on salary=100-40=60

on remaining 10% spends on travels= =60-6=54

On remaining % spends on food= =54-9=45

Saved=45

Amount he spent on food=9

45 6750

9 ?

The amount spent on food is 1350

Observe the below figure

Assume income =100

**Problem 2:** A man spends 75% of his income. His income is increased by 20% and he increased his expenditure by 10%. Are his savings increased by?

Solution: A man sends his income is 75%

The fractional value of 75%=

Here 4 is the actual income and 3 is the expenditure

Savings are 4-3=1

He increases his income by 20%

4+0.8=4.8

He increases his expenditure by 10%

3+0.3=3.3

Savings = 4.8-3.3=1.5

Percentage change =

=

=50%

Observe the below figure

**Problem 3:** The price of sugar is increased by % and the consumption of a family is decreased by 20%. Find the percentage change in expenditure?

Solution :%= 20%=

Actual price is 6 and increased price is 7

Actual consumption is 5 and decreased consumption is 4

Price * Consumption = Expenditure

6*5=30 7*4=28

Percentage change=

=%

Observe the below figure

**Problem 4:** The sale of a cinema ticket is increased by % and the price of a ticket is increased by %. Find the change in the return?

Solution: %= %=

Percentage change =

=

=%