-70.44% is the change from 521 to 154
Calculation steps:
[( 154 - 521 ) ÷ 521] x 100 = -70.44%
Formula
Percentage change = [(154 - 521) / 521] x 100
Subtract the new number by the original number
154 - 521 = -367
-367 ÷ 521 = -0.7044145873320538
-0.7044145873320538 x 100 = -70.44%