-60.27% is the change from 521 to 207
Calculation steps:
[( 207 - 521 ) ÷ 521] x 100 = -60.27%
Formula
Percentage change = [(207 - 521) / 521] x 100
Subtract the new number by the original number
207 - 521 = -314
-314 ÷ 521 = -0.6026871401151631
-0.6026871401151631 x 100 = -60.27%