-61.23% is the change from 521 to 202
Calculation steps:
[( 202 - 521 ) ÷ 521] x 100 = -61.23%
Formula
Percentage change = [(202 - 521) / 521] x 100
Subtract the new number by the original number
202 - 521 = -319
-319 ÷ 521 = -0.6122840690978887
-0.6122840690978887 x 100 = -61.23%