-58.7% is the change from 828 to 342
Calculation steps:
[( 342 - 828 ) ÷ 828] x 100 = -58.7%
Formula
Percentage change = [(342 - 828) / 828] x 100
Subtract the new number by the original number
342 - 828 = -486
-486 ÷ 828 = -0.5869565217391305
-0.5869565217391305 x 100 = -58.7%