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 = 774, v2 = - 64,329,819.3.
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: - 5.
- Choose a random positive number for the end value: 76.
Formula and calculation:
(v1 - v2) / v1 =
(- 5 - 76) / - 5 =
-81 / - 5 =
16.2
Although the absolute difference is negative: -81, the relative decrease change is positive: 16.2. 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:
(774 - (- 64,329,819.3))/|774| =
(774 + 64,329,819.3)/|774| =
64,330,593.3/774 =
64,330,593.3 ÷ 774 =
64,330,593.3 ÷ 774 × 100/100 =
(64,330,593.3 × 100 ÷ 774)/100 =
(6,433,059,330 ÷ 774)/100 ≈
8,311,446.162790697674/100 =
8,311,446.162790697674% ≈
8,311,446.16%
(Rounded off to max. 2 decimal places)
The relative percent decrease change
from the original, initial value 774 to the final, end value - 64,329,819.3:
Rounded off to max. 12 decimal places ≈ 8,311,446.162790697674%
Rounded off to max. 2 decimal places ≈ 8,311,446.16%
The absolute (actual) difference
774 + 64,329,819.3 = 64,330,593.3
By what percentage has 774 decreased?
Answer: By ≈ 8,311,446.16%
By what percentage is - 64,329,819.3 smaller than 774?
Answer: By ≈ 8,311,446.16%
The relative percent decrease change is positive,
so we really have a relative percent decrease
(the value goes down).