-81.26% is the change from 827 to 155
Calculation steps:
[( 155 - 827 ) ÷ 827] x 100 = -81.26%
Formula
Percentage change = [(155 - 827) / 827] x 100
Subtract the new number by the original number
155 - 827 = -672
-672 ÷ 827 = -0.8125755743651754
-0.8125755743651754 x 100 = -81.26%