Banking Maths percentage SSC SSC-Maths

Important Notes on Percentage

What do you mean by Percentage?

  • Percent is derived from Latin word ‘per centum’ which means ‘per hundred.
  • Percentage is a way of comparing quantities.
  • Percentages are basically numerators of fractions with denominator 100.
  • Percent is represented by the symbol – ‘%’.

Ex- 1% means 1 out of 100 or one hundredth.

1% = 1/100 = 0.01

Interpreting Percentages

Example – What do you mean by this statement.

Let say – “Raj saves 25% of his income.

Interpretation – It means 25 parts out of 100, or it means Raj is saving 25 rupees out of every 100 rupees that he earns.

Important Formulas

1. % Change – (Increase or decrease)

℅change = [(Final value – Initial Value)/ Initial Value] × 100

  • Remember Percentage change is always calculated wrt the initial value. So, take initial value as reference value for finding %change.
  • Note- Always take ‘+’ for increase and ‘-‘ for decrease.

2. If price of an article increases or decreases by ‘x℅’, then reduction in consumption, and expenditure remaining same.

[(100 × x)/(100 + x)] ℅

3. If price of an article decreases by ‘x℅’, then reduction in consumption, and expenditure remaining same

[(100 × x)/(100 – x)] ℅

For Objective Type Questions – Click Here

Loading...

Leave a Comment