-70.56% is the change from 917 to 270
Calculation steps:
[( 270 - 917 ) ÷ 917] x 100 = -70.56%
Formula
Percentage change = [(270 - 917) / 917] x 100
Subtract the new number by the original number
270 - 917 = -647
-647 ÷ 917 = -0.7055616139585605
-0.7055616139585605 x 100 = -70.56%