To calculate the percentage decrease from 30 to 20, we use the following formula:

**((N1-N2)/N1)*100 = PD**

N1 = Number 1 (From)

N2 = Number 2 (To)

PD = Percentage Decrease

When we plug in 30 for N1 and 20 for N2, we get the following:

((30-20)/30)*100 = PD

And when we put that into our calculator, we get the answer to "What is the percentage decrease from 30 to 20?" as follows:

**33.33%**

Note: All percentage answers are rounded to the nearest two decimals if necessary.

**Percentage Decrease Calculator**

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