-70.83% is the change from 521 to 152
Calculation steps:
[( 152 - 521 ) ÷ 521] x 100 = -70.83%
Formula
Percentage change = [(152 - 521) / 521] x 100
Subtract the new number by the original number
152 - 521 = -369
-369 ÷ 521 = -0.708253358925144
-0.708253358925144 x 100 = -70.83%