-39.11% is the change from 854 to 520
Calculation steps:
[( 520 - 854 ) ÷ 854] x 100 = -39.11%
Formula
Percentage change = [(520 - 854) / 854] x 100
Subtract the new number by the original number
520 - 854 = -334
-334 ÷ 854 = -0.3911007025761124
-0.3911007025761124 x 100 = -39.11%