-29.92% is the change from 919 to 644
Calculation steps:
[( 644 - 919 ) ÷ 919] x 100 = -29.92%
Formula
Percentage change = [(644 - 919) / 919] x 100
Subtract the new number by the original number
644 - 919 = -275
-275 ÷ 919 = -0.2992383025027203
-0.2992383025027203 x 100 = -29.92%