-40.89% is the change from 851 to 503
Calculation steps:
[( 503 - 851 ) ÷ 851] x 100 = -40.89%
Formula
Percentage change = [(503 - 851) / 851] x 100
Subtract the new number by the original number
503 - 851 = -348
-348 ÷ 851 = -0.408930669800235
-0.408930669800235 x 100 = -40.89%