-29.5% is the change from 644 to 454
Calculation steps:
[( 454 - 644 ) ÷ 644] x 100 = -29.5%
Formula
Percentage change = [(454 - 644) / 644] x 100
Subtract the new number by the original number
454 - 644 = -190
-190 ÷ 644 = -0.2950310559006211
-0.2950310559006211 x 100 = -29.5%