-29.41% is the change from 646 to 456
Calculation steps:
[( 456 - 646 ) ÷ 646] x 100 = -29.41%
Formula
Percentage change = [(456 - 646) / 646] x 100
Subtract the new number by the original number
456 - 646 = -190
-190 ÷ 646 = -0.29411764705882354
-0.29411764705882354 x 100 = -29.41%