-23.31% is the change from 841 to 645
Calculation steps:
[( 645 - 841 ) ÷ 841] x 100 = -23.31%
Formula
Percentage change = [(645 - 841) / 841] x 100
Subtract the new number by the original number
645 - 841 = -196
-196 ÷ 841 = -0.23305588585017836
-0.23305588585017836 x 100 = -23.31%