Answer: Calculate the New Value
New value =
80 - Percentage decrease =
80 - (80% × 80) =
80 - 80% × 80 =
(1 - 80%) × 80 =
(100% - 80%) × 80 =
20% × 80 =
20 ÷ 100 × 80 =
20 × 80 ÷ 100 =
1,600 ÷ 100 =
16
Calculate absolute change (actual difference)
Absolute change (actual difference) =
New value - 80 =
16 - 80 =
- 64