-7.89% is the change from 646 to 595
Calculation steps:
[( 595 - 646 ) ÷ 646] x 100 = -7.89%
Formula
Percentage change = [(595 - 646) / 646] x 100
Subtract the new number by the original number
595 - 646 = -51
-51 ÷ 646 = -0.07894736842105263
-0.07894736842105263 x 100 = -7.89%