A percentage is a proportion that shows a number as parts per hundred. The symbol '%' means 'per cent'. 9% means 9 out of every 100, or \(\frac{9}{100}\). Knowledge of converting between decimals, ...
To find the original value of an amount before the percentage increase/decrease: Write the amount as a percentage of the original value. Find 1% of the original value. The original value is 100%, so ...
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