-39.28% is the change from 527 to 320
Calculation steps:
[( 320 - 527 ) ÷ 527] x 100 = -39.28%
Formula
Percentage change = [(320 - 527) / 527] x 100
Subtract the new number by the original number
320 - 527 = -207
-207 ÷ 527 = -0.3927893738140417
-0.3927893738140417 x 100 = -39.28%