How to decrease the number - 200
by 2% of its value?
Value of Percentage Decrease. New Value
- A percentage value is nothing but a fraction with a denominator of 100:
- 2% = 2/100 = 2 ÷ 100 = 0.02
- ...
- To decrease a negative number, don't subtract from it, but add to it the 'Value of Percentage Decrease'.
- To decrease a positive number, subtract from it the 'Value of Percentage Decrease'.
- ...
Value of Percentage Decrease =
Percentage of the Decrease % × The original value =
2% × - 200
New Value =
The original value - Value of Percentage Decrease =
- 200 + (2% × - 200)
1. Calculate the End Value
decreased by a percentage of its Initial Value
End Value =
- 200 + Value of Percentage Decrease =
- 200 + (2% × - 200) =
- 200 + 2% × - 200 =
(- 200 is a common factor)
(1 + 2%) × - 200 =
(100% + 2%) × - 200 =
102% × - 200 =
102 ÷ 100 × - 200 =
102 × - 200 ÷ 100 =
- 20,400 ÷ 100 =
- 204
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 =
2% × - 200
The second method:
Value of Percentage Decrease =
The original value - New Value
Value of Percentage Decrease =
4
The end value: - 200 decreased by 2% percent = - 204
Value of Percentage Decrease = 4