-21.2% is the change from 830 to 654
Calculation steps:
[( 654 - 830 ) ÷ 830] x 100 = -21.2%
Formula
Percentage change = [(654 - 830) / 830] x 100
Subtract the new number by the original number
654 - 830 = -176
-176 ÷ 830 = -0.21204819277108433
-0.21204819277108433 x 100 = -21.2%