The relative decrease change. Definition:
The relative decrease change is the difference in an indicator over two periods in time, v1 - v2, relative to the value of the indicator in the earlier period, v1.
- Where:
- v1 - is called the reference value (original, initial number);
- v2 - is called the new value (the end value).
- In our case: v1 = 24,766.87, v2 = 62,752.3.
The relative decrease change. Formula:
The relative decrease change =
The actual change / |v1|
(v1 - v2) / |v1| =
- Legend:
- v1 - the original number
- |v1| - the positive value of v1, |v1| >= 0. By example: |10| = 10; |-10| = 10.
- v2 - the new value
- The actual change = v1 - v2
- / - the fraction bar (division)
Why do we use |v1| in the formula instead of v1?
- Let's see what happens if we use v1 instead of |v1|:
- Choose a random negative number as the initial value: - 53.
- Choose a random positive number for the end value: 57.
Formula and calculation:
(v1 - v2) / v1 =
(- 53 - 57) / - 53 =
-110 / - 53 ≈
2.075471698113 ≈
2.08
Although the absolute difference is negative: -110, the relative decrease change is positive: 2.08. By using |v1| instead of v1, the error is corrected.
The relative percent decrease change. Detailed calculations below
By multiplying a number by the fraction 100/100,
we change only the form of the result, not the result.
- 100/100 = 100% = 100 ÷ 100 = 1.
- n × 100/100 = (n × 100)/100 = (n × 100)%, any number.
The relative percent decrease change. Formula:
The relative percent decrease change =
The relative decrease change × 100/100 =
(The relative decrease change × 100)/100 =
(The relative decrease change × 100)%
Calculate the relative percent decrease change:
(24,766.87 - 62,752.3)/|24,766.87| =
- 37,985.43/24,766.87 =
- 37,985.43 ÷ 24,766.87 =
- 37,985.43 ÷ 24,766.87 × 100/100 =
(- 37,985.43 × 100 ÷ 24,766.87)/100 =
(- 3,798,543 ÷ 24,766.87)/100 =
- 153.37194405268/100 =
- 153.37194405268% ≈
- 153.37%
(Rounded off to max. 2 decimal places)
The relative percent decrease change
from the original, initial value 24,766.87 to the final, end value 62,752.3:
Not rounded = - 153.37194405268%
Rounded off to max. 2 decimal places ≈ - 153.37%
The absolute (actual) difference
24,766.87 - 62,752.3 = - 37,985.43
By what percentage has 24,766.87 decreased?
Answer: By ≈ - 153.37%
By what percentage is 62,752.3 smaller than 24,766.87?
Answer: By ≈ - 153.37%
The relative percent decrease change is negative,
so in this case we really have a relative percent increase instead
(the value goes up).