Percentage: Important points to remember — lesson. Mathematics State Board, Class 7.

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To convert a fraction into a we multiply the by $100$ .
To convert a into a , we write it as a and multiply it by $100$ .
To convert a decimal into a per cent, we shift the decimal point to the or multiply that by $100$ and put the percentage symbol at the end.
To convert a into a , we remove the per cent sign( $\%$ ) and divide it by $100$ .
To convert a into a we remove the per cent sign( $\%$ ) and form a with the remaining number as the first term and $100$ as the second term.
To convert a into a , we remove the sign( $\%$ ) and shift the decimal points two places to the left.
To express $x$ as a percentage of $y$ ; percentage $=$ $[\frac{x}{y} \times 100] %$ .
If $x$ of a quantity is $y$ , then whole quantity $=$ $[\frac{y}{x} \times 100] %$ .

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5. Percentage: Important points to remember