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 = 270,000, v2 = 175,017.
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: 96.
Formula and calculation:
(v1 - v2) / v1 =
(- 56 - 96) / - 56 =
-152 / - 56 ≈
2.714285714286 ≈
2.71
Although the absolute difference is negative: -152, the relative decrease change is positive: 2.71. 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:
(270,000 - 175,017)/|270,000| =
94,983/270,000 =
94,983 ÷ 270,000 =
94,983 ÷ 270,000 × 100/100 =
(94,983 × 100 ÷ 270,000)/100 =
(9,498,300 ÷ 270,000)/100 ≈
35.178888888889/100 =
35.178888888889% ≈
35.18%
(Rounded off to max. 2 decimal places)
The relative percent decrease change
from the original, initial value 270,000 to the final, end value 175,017:
Rounded off to max. 12 decimal places ≈ 35.178888888889%
Rounded off to max. 2 decimal places ≈ 35.18%
The absolute (actual) difference
270,000 - 175,017 = 94,983
By what percentage has 270,000 decreased?
Answer: By ≈ 35.18%
By what percentage is 175,017 smaller than 270,000?
Answer: By ≈ 35.18%
The relative percent decrease change is positive,
so we really have a relative percent decrease
(the value goes down).