-59.31% is the change from 521 to 212
Calculation steps:
[( 212 - 521 ) ÷ 521] x 100 = -59.31%
Formula
Percentage change = [(212 - 521) / 521] x 100
Subtract the new number by the original number
212 - 521 = -309
-309 ÷ 521 = -0.5930902111324377
-0.5930902111324377 x 100 = -59.31%