-41.01% is the change from 851 to 502
Calculation steps:
[( 502 - 851 ) ÷ 851] x 100 = -41.01%
Formula
Percentage change = [(502 - 851) / 851] x 100
Subtract the new number by the original number
502 - 851 = -349
-349 ÷ 851 = -0.4101057579318449
-0.4101057579318449 x 100 = -41.01%