-39.36% is the change from 841 to 510
Calculation steps:
[( 510 - 841 ) ÷ 841] x 100 = -39.36%
Formula
Percentage change = [(510 - 841) / 841] x 100
Subtract the new number by the original number
510 - 841 = -331
-331 ÷ 841 = -0.3935790725326992
-0.3935790725326992 x 100 = -39.36%