Complex Examples of Percentages 1
In this class, We discuss Complex Examples of Percentages 1.
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Example 1:
Paul spends 75% of his income. His income is increased by 20%.
He increased his expenditure by 10%. Find the percentage increase in savings.
Solution:
Let income = 100 Rs.
Expenditure = 75
Savings = 25
New income = 120
New expenditure = 75 + 10% of 75 or 110% of 75
= (110/100)*75
= 82.5
New Savings = 120 – 82.5
= 37.5
Increase in savings = 37.5 – 25 = 12.5
Percentage increase in savings = (12.5/25) * 100 = 50%
Example 2:
When the price of a product decreased by 10%, The number sold increased by 30%.
What was the percentage effect on revenue?
Solution:
The price of the product = 100
Let sale = 100 pieces
Revenue = 100 * 100 = 10000
New revenue = 90 * 130
= 11700
Percentage increase in revenue = (1700/10000) * 100 = 17%