If the decimal has more than two decimal places, the figures after the second one are written as a fraction of a per cent, as,—
| .255 | = | 251⁄2100 | = | 251⁄2%. |
| .163 | = | 163⁄10100 | = | 163⁄10%. |
To change a common fraction to per cent:
1. Change the fraction to a decimal.
2. Express the decimal as hundredths.
3. The result is the per cent desired.
Examples:
| 1⁄2 | = | .5 | = | .50 | = | 50% |
| 3⁄4 | = | .75 | = | 75% | ||
| 2⁄3 | = | .662⁄3 | = | 662⁄3% | ||
| 9⁄10 | = | .90 | = | 90% | ||
| 8⁄9 | = | .888⁄9 | = | 882⁄9% | ||
| 7⁄8 | = | .871⁄2 | = | 871⁄2% | ||
| 25⁄26 | = | .962⁄13 | = | 962⁄13% | ||
Or, they may be written this way:
| 3⁄4 | = | 3⁄4 of | 100100 | = | 75100 | = | 75% |
| 2⁄3 | = | 2⁄3 of | 100100 | = | 662⁄3100 | = | 662⁄3% |
| 1⁄2 | = | 1⁄2 of | 100100 | = | 50100 | = | 50% |