-89.77% is the change from 841 to 86
Calculation steps:
[( 86 - 841 ) ÷ 841] x 100 = -89.77%
Formula
Percentage change = [(86 - 841) / 841] x 100
Subtract the new number by the original number
86 - 841 = -755
-755 ÷ 841 = -0.8977407847800237
-0.8977407847800237 x 100 = -89.77%