-70.63% is the change from 521 to 153
Calculation steps:
[( 153 - 521 ) ÷ 521] x 100 = -70.63%
Formula
Percentage change = [(153 - 521) / 521] x 100
Subtract the new number by the original number
153 - 521 = -368
-368 ÷ 521 = -0.7063339731285988
-0.7063339731285988 x 100 = -70.63%