What is the percent decrease from 20 to 11?

##45%##

To find the percent decrease or increase between any two numbers, you first need to find the difference between them by subtracting the new number from the old number.

In this case:

##20## is the original number ##11## is the new number

##20-11=9##

You then divide the difference (9) by the original number (20)

##9-:20=0.45##

Multiply that number by 100 to find the percent.

##0.45 xx 100 = 45%##

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