-70.62% is the change from 919 to 270
Calculation steps:
[( 270 - 919 ) ÷ 919] x 100 = -70.62%
Formula
Percentage change = [(270 - 919) / 919] x 100
Subtract the new number by the original number
270 - 919 = -649
-649 ÷ 919 = -0.70620239390642
-0.70620239390642 x 100 = -70.62%