-9.93% is the change from 715 to 644
Calculation steps:
[( 644 - 715 ) ÷ 715] x 100 = -9.93%
Formula
Percentage change = [(644 - 715) / 715] x 100
Subtract the new number by the original number
644 - 715 = -71
-71 ÷ 715 = -0.0993006993006993
-0.0993006993006993 x 100 = -9.93%