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PercentLab
((new − old) / |old|) × 100.
Percentage change expresses how big a change is relative to the starting point — a $10 raise means a lot more to someone earning $50 than someone earning $5,000, and percentage change captures that context the raw difference alone misses.
Dividing by |old| instead of old keeps the sign of the result meaningful (increase vs. decrease) even when the starting value itself is negative.
Change %
30
((new − old) / |old|) × 100
What you entered
Absolute change
130 − 100= 30Divide by the absolute original value
30 ÷ |100|= 0.3Convert to a percentage
× 100= 30%Result
Change %: 30
Going from 100 to 130 is a increase of 30%.