-92.39% is the change from 841 to 64
Calculation steps:
[( 64 - 841 ) ÷ 841] x 100 = -92.39%
Formula
Percentage change = [(64 - 841) / 841] x 100
Subtract the new number by the original number
64 - 841 = -777
-777 ÷ 841 = -0.9239001189060642
-0.9239001189060642 x 100 = -92.39%