How to decrease the number - 16
by 7% of its value?
Value of Percentage Decrease. New Value
- A percentage value is nothing but a fraction with a denominator of 100:
- 7% = 7/100 = 7 ÷ 100 = 0.07
- ...
- 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 =
7% × - 16
New Value =
The original value - Value of Percentage Decrease =
- 16 + (7% × - 16)
1. Calculate the End Value
decreased by a percentage of its Initial Value
End Value =
- 16 + Value of Percentage Decrease =
- 16 + (7% × - 16) =
- 16 + 7% × - 16 =
(- 16 is a common factor)
(1 + 7%) × - 16 =
(100% + 7%) × - 16 =
107% × - 16 =
107 ÷ 100 × - 16 =
107 × - 16 ÷ 100 =
- 1,712 ÷ 100 =
- 17.12
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 =
7% × - 16
The second method:
Value of Percentage Decrease =
The original value - New Value
Value of Percentage Decrease =
1.12
The end value: - 16 decreased by 7% percent = - 17.12
Value of Percentage Decrease = 1.12