How to decrease the number - 3
by - 3% of its value?
Value of Percentage Decrease. New Value
- A percentage value is nothing but a fraction with a denominator of 100:
- - 3% = - 3/100 = - 3 ÷ 100 = - 0.03
- ...
- 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 =
- 3% × - 3
New Value =
The original value - Value of Percentage Decrease =
- 3 + (- 3% × - 3)
1. Calculate the End Value
decreased by a percentage of its Initial Value
End Value =
- 3 + Value of Percentage Decrease =
- 3 + (- 3% × - 3) =
- 3 - 3% × - 3 =
(- 3 is a common factor)
(1 - 3%) × - 3 =
(100% - 3%) × - 3 =
97% × - 3 =
97 ÷ 100 × - 3 =
97 × - 3 ÷ 100 =
- 291 ÷ 100 =
- 2.91
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 =
- 3% × - 3
The second method:
Value of Percentage Decrease =
The original value - New Value
Value of Percentage Decrease =
- 0.09
The value of the decrease is negative, so we are actually dealing with a Percentage Increase.
The end value: - 3 decreased by - 3% percent = - 2.91
Value of Percentage Decrease = - 0.09