\[\frac{20}{5}\]

1
For the denominator, recognize that 5×20=1005\times 20=100.
Multiple = 2020

2
Multiply both the numerator and denominator by the multiple 2020.
20×205×20\frac{20\times 20}{5\times 20}

3
Simplify.
400100\frac{400}{100}

4
Simplify.
400%400\%

Done

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