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: - 20.
- Choose a random positive number for the end value: 27.
Formula and calculation:
(v1 - v2) / v1 =
(- 20 - 27) / - 20 =
-47 / - 20 =
2.35
Although the absolute difference is negative: -47, the relative decrease change is positive: 2.35. 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:
(6,342,043,643 - 5,115,432,916.1)/|6,342,043,643| =
1,226,610,726.9/6,342,043,643 =
1,226,610,726.9 ÷ 6,342,043,643 =
1,226,610,726.9 ÷ 6,342,043,643 × 100/100 =
(1,226,610,726.9 × 100 ÷ 6,342,043,643)/100 =
(122,661,072,690 ÷ 6,342,043,643)/100 ≈
19.340937968061/100 =
19.340937968061% ≈
19.34%
(Rounded off to max. 2 decimal places)
The relative percent decrease change
from the original, initial value 6,342,043,643 to the final, end value 5,115,432,916.1:
Rounded off to max. 12 decimal places ≈ 19.340937968061%
Rounded off to max. 2 decimal places ≈ 19.34%
The absolute (actual) difference
6,342,043,643 - 5,115,432,916.1 = 1,226,610,726.9
By what percentage has 6,342,043,643 decreased?
Answer: By ≈ 19.34%
By what percentage is 5,115,432,916.1 smaller than 6,342,043,643?
Answer: By ≈ 19.34%
The relative percent decrease change is positive,
so we really have a relative percent decrease
(the value goes down).