The value of 5% of 20 is ____?

A. 0.1
B. 1.0
C. 2.0
D. 4.0

5% of 20

To calculate 5% of a number, you multiply that number by 0.05. In this case, you would multiply 20 by 0.05 to find that 5% of 20 is 1.

Another way to express this mathematically:
5% = 0.05
20 x 0.05 = 1

This is because any percentage (such as 5%) can be expressed as a decimal by moving the decimal two places to the left (in this case, from 5 to 0.05), and multiplying by this decimal will give you the percentage of the number.