How to decrease the number 25
by 16% of its value?
Value of Percentage Decrease. New Value
- A percentage value is nothing but a fraction with a denominator of 100:
- 16% = 16/100 = 16 ÷ 100 = 0.16
- ...
- To decrease a positive number, subtract from it the 'Value of Percentage Decrease'.
- To decrease a negative number, don't subtract from it, but add to it the 'Value of Percentage Decrease'.
- ...
Value of Percentage Decrease =
Percentage of the Decrease % × The original value =
16% × 25
New Value =
The original value - Value of Percentage Decrease =
25 - (16% × 25)
1. Calculate the End Value
decreased by a percentage of its Initial Value
End Value =
25 - Value of Percentage Decrease =
25 - (16% × 25) =
25 - 16% × 25 =
(25 is a common factor)
(1 - 16%) × 25 =
(100% - 16%) × 25 =
84% × 25 =
84 ÷ 100 × 25 =
84 × 25 ÷ 100 =
2,100 ÷ 100 =
21
2. Value of Percentage Decrease
It can be calculated in two ways.
The first method:
Value of Percentage Decrease =
Percentage of the Decrease % × The original value =
16% × 25
The second method:
Value of Percentage Decrease =
The original value - New Value
Value of Percentage Decrease =
4
The end value: 25 decreased by 16% percent = 21
Value of Percentage Decrease = 4