-82.85% is the change from 828 to 142
Calculation steps:
[( 142 - 828 ) ÷ 828] x 100 = -82.85%
Formula
Percentage change = [(142 - 828) / 828] x 100
Subtract the new number by the original number
142 - 828 = -686
-686 ÷ 828 = -0.8285024154589372
-0.8285024154589372 x 100 = -82.85%