-90.37% is the change from 841 to 81
Calculation steps:
[( 81 - 841 ) ÷ 841] x 100 = -90.37%
Formula
Percentage change = [(81 - 841) / 841] x 100
Subtract the new number by the original number
81 - 841 = -760
-760 ÷ 841 = -0.9036860879904876
-0.9036860879904876 x 100 = -90.37%