-67.65% is the change from 850 to 275
Calculation steps:
[( 275 - 850 ) ÷ 850] x 100 = -67.65%
Formula
Percentage change = [(275 - 850) / 850] x 100
Subtract the new number by the original number
275 - 850 = -575
-575 ÷ 850 = -0.6764705882352942
-0.6764705882352942 x 100 = -67.65%