-69.79% is the change from 917 to 277
Calculation steps:
[( 277 - 917 ) ÷ 917] x 100 = -69.79%
Formula
Percentage change = [(277 - 917) / 917] x 100
Subtract the new number by the original number
277 - 917 = -640
-640 ÷ 917 = -0.697928026172301
-0.697928026172301 x 100 = -69.79%