-77.1% is the change from 917 to 210
Calculation steps:
[( 210 - 917 ) ÷ 917] x 100 = -77.1%
Formula
Percentage change = [(210 - 917) / 917] x 100
Subtract the new number by the original number
210 - 917 = -707
-707 ÷ 917 = -0.7709923664122137
-0.7709923664122137 x 100 = -77.1%