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: - 5.
- Choose a random positive number for the end value: 33.
Formula and calculation:
(v1 - v2) / v1 =
(- 5 - 33) / - 5 =
-38 / - 5 =
7.6
Although the absolute difference is negative: -38, the relative decrease change is positive: 7.6. 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:
(5,966,175,415 - 4,803,588,790.6)/|5,966,175,415| =
1,162,586,624.4/5,966,175,415 =
1,162,586,624.4 ÷ 5,966,175,415 =
1,162,586,624.4 ÷ 5,966,175,415 × 100/100 =
(1,162,586,624.4 × 100 ÷ 5,966,175,415)/100 =
(116,258,662,440 ÷ 5,966,175,415)/100 ≈
19.486296388086/100 =
19.486296388086% ≈
19.49%
(Rounded off to max. 2 decimal places)
The relative percent decrease change
from the original, initial value 5,966,175,415 to the final, end value 4,803,588,790.6:
Rounded off to max. 12 decimal places ≈ 19.486296388086%
Rounded off to max. 2 decimal places ≈ 19.49%
The absolute (actual) difference
5,966,175,415 - 4,803,588,790.6 = 1,162,586,624.4
By what percentage has 5,966,175,415 decreased?
Answer: By ≈ 19.49%
By what percentage is 4,803,588,790.6 smaller than 5,966,175,415?
Answer: By ≈ 19.49%
The relative percent decrease change is positive,
so we really have a relative percent decrease
(the value goes down).