Detailed calculations & verification
Introduction. Percent, p%
'Percent (%)' means 'out of one hundred':
p% = p 'out of one hundred',
p% is read p 'percent',
p% = p/100 = p ÷ 100.
- 1% = - 1/100 = - 1 ÷ 100 = - 0.01.
100% = 100/100 = 100 ÷ 100 = 1.
Decrease number by - 1% of its value.
Percentage decrease = - 1% × 7,058
New value = 7,058 - Percentage decrease
Calculate the New Value
New value =
7,058 - Percentage decrease =
7,058 - (- 1% × 7,058) =
7,058 + 1% × 7,058 =
(1 + 1%) × 7,058 =
(100% + 1%) × 7,058 =
101% × 7,058 =
101 ÷ 100 × 7,058 =
101 × 7,058 ÷ 100 =
712,858 ÷ 100 =
7,128.58
Calculate absolute change (actual difference)
Absolute change (actual difference) =
New value - 7,058 =
7,128.58 - 7,058 =
70.58
Proof.
Calculate percentage increase...
... And see if we get as a result
the absolute change (actual difference).
Percentage decrease =
- 1% × 7,058 =
- 1 ÷ 100 × 7,058 =
- 1 × 7,058 ÷ 100 =
- 7,058 ÷ 100 =
- 70.58
So we have proven that the calculations are correct.
For positive numbers
Absolute change (actual difference) =
- 1 × Percentage decrease
Answer:
7,058 decreased by - 1% = 7,128.58
Absolute change (actual difference):
7,128.58 - 7,058 = 70.58