-73.13% is the change from 521 to 140
Calculation steps:
[( 140 - 521 ) ÷ 521] x 100 = -73.13%
Formula
Percentage change = [(140 - 521) / 521] x 100
Subtract the new number by the original number
140 - 521 = -381
-381 ÷ 521 = -0.7312859884836852
-0.7312859884836852 x 100 = -73.13%