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The Brainliest Answer!

To solve percentage, you need to:

1. Change "rate" to decimal by dividing it by 100.

20 / 100 = .20

2. After that, multiply the decimal by 100.

.20 x 100 = 20

Hence,

20% of 100 is

Let : PS-percentage score

NI- Number of items

CA-Correct answer.

PS=(CA/NI)(100)

=(25/50)(100)

=50%

Note:100 is constant.I mean as is in getting percentage.