Convert 501% to a decimal. how would i do this?

Whenever you want to convert a percent to a decimal, just move the decimal point two times to the right...here are some examples
9% move the decimal two places to the right and get  .09
10.3% move the decimal two places to the right and get  .103
20% move the decimal two places to the right and get  .20

so for your question, 501% move the decimal two places to the right and get 5.01%
if you don't see the decimal point in the percent that means its at the end of the number ex: 20% is 20.%