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.%