-78.11% is the change from 909 to 199
Calculation steps:
[( 199 - 909 ) ÷ 909] x 100 = -78.11%
Formula
Percentage change = [(199 - 909) / 909] x 100
Subtract the new number by the original number
199 - 909 = -710
-710 ÷ 909 = -0.7810781078107811
-0.7810781078107811 x 100 = -78.11%