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: - 25.
- Choose a random positive number for the end value: 47.
Formula and calculation:
(v1 - v2) / v1 =
(- 25 - 47) / - 25 =
-72 / - 25 =
2.88
Although the absolute difference is negative: -72, the relative decrease change is positive: 2.88. 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:
(5,857,085,299 - 645,215.91)/|5,857,085,299| =
5,856,440,083.09/5,857,085,299 =
5,856,440,083.09 ÷ 5,857,085,299 =
5,856,440,083.09 ÷ 5,857,085,299 × 100/100 =
(5,856,440,083.09 × 100 ÷ 5,857,085,299)/100 =
(585,644,008,309 ÷ 5,857,085,299)/100 ≈
99.988984010356/100 =
99.988984010356% ≈
99.99%
(Rounded off to max. 2 decimal places)
The relative percent decrease change
from the original, initial value 5,857,085,299 to the final, end value 645,215.91:
Rounded off to max. 12 decimal places ≈ 99.988984010356%
Rounded off to max. 2 decimal places ≈ 99.99%
The absolute (actual) difference
5,857,085,299 - 645,215.91 = 5,856,440,083.09
By what percentage has 5,857,085,299 decreased?
Answer: By ≈ 99.99%
By what percentage is 645,215.91 smaller than 5,857,085,299?
Answer: By ≈ 99.99%
The relative percent decrease change is positive,
so we really have a relative percent decrease
(the value goes down).