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 = 12,764, v2 = 9,365.9.
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: - 56.
- Choose a random positive number for the end value: 47.
Formula and calculation:
(v1 - v2) / v1 =
(- 56 - 47) / - 56 =
-103 / - 56 ≈
1.839285714286 ≈
1.84
Although the absolute difference is negative: -103, the relative decrease change is positive: 1.84. 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:
(12,764 - 9,365.9)/|12,764| =
3,398.1/12,764 =
3,398.1 ÷ 12,764 =
3,398.1 ÷ 12,764 × 100/100 =
(3,398.1 × 100 ÷ 12,764)/100 =
(339,810 ÷ 12,764)/100 ≈
26.622532121592/100 =
26.622532121592% ≈
26.62%
(Rounded off to max. 2 decimal places)
The relative percent decrease change
from the original, initial value 12,764 to the final, end value 9,365.9:
Rounded off to max. 12 decimal places ≈ 26.622532121592%
Rounded off to max. 2 decimal places ≈ 26.62%
The absolute (actual) difference
12,764 - 9,365.9 = 3,398.1
By what percentage has 12,764 decreased?
Answer: By ≈ 26.62%
By what percentage is 9,365.9 smaller than 12,764?
Answer: By ≈ 26.62%
The relative percent decrease change is positive,
so we really have a relative percent decrease
(the value goes down).