-23.42% is the change from 841 to 644
Calculation steps:
[( 644 - 841 ) ÷ 841] x 100 = -23.42%
Formula
Percentage change = [(644 - 841) / 841] x 100
Subtract the new number by the original number
644 - 841 = -197
-197 ÷ 841 = -0.2342449464922711
-0.2342449464922711 x 100 = -23.42%