-29.35% is the change from 644 to 455
Calculation steps:
[( 455 - 644 ) ÷ 644] x 100 = -29.35%
Formula
Percentage change = [(455 - 644) / 644] x 100
Subtract the new number by the original number
455 - 644 = -189
-189 ÷ 644 = -0.29347826086956524
-0.29347826086956524 x 100 = -29.35%