-42.99% is the change from 521 to 297
Calculation steps:
[( 297 - 521 ) ÷ 521] x 100 = -42.99%
Formula
Percentage change = [(297 - 521) / 521] x 100
Subtract the new number by the original number
297 - 521 = -224
-224 ÷ 521 = -0.42994241842610365
-0.42994241842610365 x 100 = -42.99%