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 = 43,120,390, v2 = 3,303.
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: - 87.
- Choose a random positive number for the end value: 26.
Formula and calculation:
(v1 - v2) / v1 =
(- 87 - 26) / - 87 =
-113 / - 87 ≈
1.298850574713 ≈
1.3
Although the absolute difference is negative: -113, the relative decrease change is positive: 1.3. 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:
(43,120,390 - 3,303)/|43,120,390| =
43,117,087/43,120,390 =
43,117,087 ÷ 43,120,390 =
43,117,087 ÷ 43,120,390 × 100/100 =
(43,117,087 × 100 ÷ 43,120,390)/100 =
(4,311,708,700 ÷ 43,120,390)/100 ≈
99.992340050728/100 =
99.992340050728% ≈
99.99%
(Rounded off to max. 2 decimal places)
The relative percent decrease change
from the original, initial value 43,120,390 to the final, end value 3,303:
Rounded off to max. 12 decimal places ≈ 99.992340050728%
Rounded off to max. 2 decimal places ≈ 99.99%
The absolute (actual) difference
43,120,390 - 3,303 = 43,117,087
By what percentage has 43,120,390 decreased?
Answer: By ≈ 99.99%
By what percentage is 3,303 smaller than 43,120,390?
Answer: By ≈ 99.99%
The relative percent decrease change is positive,
so we really have a relative percent decrease
(the value goes down).