How to Calculate the Change
Subtract the old value (90) from the new value (80), divide by the absolute value of the old value, and multiply by 100.
((80 - 90) ÷ 90) × 100 = 11.11111111%
This represents a 11.11111111% decrease
Subtract the old value (90) from the new value (80), divide by the absolute value of the old value, and multiply by 100.
((80 - 90) ÷ 90) × 100 = 11.11111111%
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