-31.81% is the change from 764 to 521
Calculation steps:
[( 521 - 764 ) ÷ 764] x 100 = -31.81%
Formula
Percentage change = [(521 - 764) / 764] x 100
Subtract the new number by the original number
521 - 764 = -243
-243 ÷ 764 = -0.3180628272251309
-0.3180628272251309 x 100 = -31.81%