-27.09% is the change from 919 to 670
Calculation steps:
[( 670 - 919 ) ÷ 919] x 100 = -27.09%
Formula
Percentage change = [(670 - 919) / 919] x 100
Subtract the new number by the original number
670 - 919 = -249
-249 ÷ 919 = -0.27094668117519044
-0.27094668117519044 x 100 = -27.09%