-31.13% is the change from 755 to 520
Calculation steps:
[( 520 - 755 ) ÷ 755] x 100 = -31.13%
Formula
Percentage change = [(520 - 755) / 755] x 100
Subtract the new number by the original number
520 - 755 = -235
-235 ÷ 755 = -0.31125827814569534
-0.31125827814569534 x 100 = -31.13%