-71.98% is the change from 521 to 146
Calculation steps:
[( 146 - 521 ) ÷ 521] x 100 = -71.98%
Formula
Percentage change = [(146 - 521) / 521] x 100
Subtract the new number by the original number
146 - 521 = -375
-375 ÷ 521 = -0.7197696737044146
-0.7197696737044146 x 100 = -71.98%