-24.38% is the change from 644 to 487
Calculation steps:
[( 487 - 644 ) ÷ 644] x 100 = -24.38%
Formula
Percentage change = [(487 - 644) / 644] x 100
Subtract the new number by the original number
487 - 644 = -157
-157 ÷ 644 = -0.24378881987577639
-0.24378881987577639 x 100 = -24.38%