-81.57% is the change from 841 to 155
Calculation steps:
[( 155 - 841 ) ÷ 841] x 100 = -81.57%
Formula
Percentage change = [(155 - 841) / 841] x 100
Subtract the new number by the original number
155 - 841 = -686
-686 ÷ 841 = -0.8156956004756243
-0.8156956004756243 x 100 = -81.57%