-31.67% is the change from 521 to 356
Calculation steps:
[( 356 - 521 ) ÷ 521] x 100 = -31.67%
Formula
Percentage change = [(356 - 521) / 521] x 100
Subtract the new number by the original number
356 - 521 = -165
-165 ÷ 521 = -0.31669865642994244
-0.31669865642994244 x 100 = -31.67%