How to decrease the number 24
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 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 =
- 3% × 24
New Value =
The original value - Value of Percentage Decrease =
24 - (- 3% × 24)
1. Calculate the End Value
decreased by a percentage of its Initial Value
End Value =
24 - Value of Percentage Decrease =
24 - (- 3% × 24) =
24 + 3% × 24 =
(24 is a common factor)
(1 + 3%) × 24 =
(100% + 3%) × 24 =
103% × 24 =
103 ÷ 100 × 24 =
103 × 24 ÷ 100 =
2,472 ÷ 100 =
24.72
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% × 24
The second method:
Value of Percentage Decrease =
The original value - New Value
Value of Percentage Decrease =
- 0.72
The value of the decrease is negative, so we are actually dealing with a Percentage Increase.
The end value: 24 decreased by - 3% percent = 24.72
Value of Percentage Decrease = - 0.72