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Round to second decimal place

This simple percentage math can be done on a basic physical calculator:

**Find % of a number**: To find what X% of Y is, type in Y, then multiply (*) by X, and divide (/) by 100. For example, for 20% of 50, you’d type:`50 * 20 / 100`

.**Find what % a number is of another**: To find out what % X is of Y, divide X by Y, then multiply (*) by 100. So, if you’re wondering what percent 10 is of 50, type:`10 / 50 * 100`

.**Find % increase**: To see the % increase from X to Y, subtract X from Y, divide by X, and then multiply by 100. For example, to calculate the increase from 30 to 45, you’d do:`45 - 30 / 30 * 100`

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