-29.37% is the change from 647 to 457
Calculation steps:
[( 457 - 647 ) ÷ 647] x 100 = -29.37%
Formula
Percentage change = [(457 - 647) / 647] x 100
Subtract the new number by the original number
457 - 647 = -190
-190 ÷ 647 = -0.2936630602782071
-0.2936630602782071 x 100 = -29.37%