B. Exercises
Test 1. Directions : Identify the base, rate and percentage. Then, find the value of the unknown
Given
Base
Rate
Percentage
N
1. 10% of n is 5
N
10%
5
50
2.25 is n% of 100
3.5% of 350 is n
4. nis 20% of 80
5. 12 is n% of 48
6. 9 is 25% of n
,
Answers & Comments
1. Base = n
Rate = 10%
Percentage = 5
n = 5 / 10% = 50
2. Base = 100
Rate = n
Percentage = 25
n = 25 / 100 = 25%
3. Base = 350
Rate = 5%
Percentage = n
n = 350 x 5% = 17.5
4. Base = 80
Rate = 20%
Percentage = n
n = 80 x 20% = 16
5. Base = 48
Rate = n
Percentage = 12
n = 12 / 48 = 25%
6. Base = n
Rate = 25%
Percentage = 9
n = 9 / 25% = 36