-7.31% is the change from 917 to 850
Calculation steps:
[( 850 - 917 ) ÷ 917] x 100 = -7.31%
Formula
Percentage change = [(850 - 917) / 917] x 100
Subtract the new number by the original number
850 - 917 = -67
-67 ÷ 917 = -0.07306434023991276
-0.07306434023991276 x 100 = -7.31%