-34.13% is the change from 835 to 550
Calculation steps:
[( 550 - 835 ) ÷ 835] x 100 = -34.13%
Formula
Percentage change = [(550 - 835) / 835] x 100
Subtract the new number by the original number
550 - 835 = -285
-285 ÷ 835 = -0.3413173652694611
-0.3413173652694611 x 100 = -34.13%