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Multiply the number by 100%. 100% equals 1, and it is always OK to multiply a number or variable by 1 because that doesn't change its value. To multiply by 100%, shift the decimal point two places to the right and insert the % symbol. For example, 1.2 = 120%.
To convert a number to a percentage multiply by 100%. 5½ = 5½ × 100 % = 5.5 × 100 % = 550 %.
Multiply the number by 0.17. or Multiply it by 17 and then divide by 100.
Apart from using a calculator, specifically if you multiply a whole number by a power of 10:* To multiply a whole number by 10, add a zero to the whole number. * To multiply a whole number by 100, add two zeros to the whole number. * Etc.
To multiply whole number by 100 simply add two zeros to the right end. Example: 341 times 100 is 34100.