How to Calculate the Change
Subtract the old value (80) from the new value (40), divide by the absolute value of the old value, and multiply by 100.
((40 - 80) ÷ 80) × 100 = 50%
This represents a 50% decrease
Subtract the old value (80) from the new value (40), divide by the absolute value of the old value, and multiply by 100.
((40 - 80) ÷ 80) × 100 = 50%
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