-38.62% is the change from 857 to 526
Calculation steps:
[( 526 - 857 ) ÷ 857] x 100 = -38.62%
Formula
Percentage change = [(526 - 857) / 857] x 100
Subtract the new number by the original number
526 - 857 = -331
-331 ÷ 857 = -0.3862310385064177
-0.3862310385064177 x 100 = -38.62%