-29.49% is the change from 919 to 648
Calculation steps:
[( 648 - 919 ) ÷ 919] x 100 = -29.49%
Formula
Percentage change = [(648 - 919) / 919] x 100
Subtract the new number by the original number
648 - 919 = -271
-271 ÷ 919 = -0.29488574537540807
-0.29488574537540807 x 100 = -29.49%