-35.67% is the change from 998 to 642
Calculation steps:
[( 642 - 998 ) ÷ 998] x 100 = -35.67%
Formula
Percentage change = [(642 - 998) / 998] x 100
Subtract the new number by the original number
642 - 998 = -356
-356 ÷ 998 = -0.35671342685370744
-0.35671342685370744 x 100 = -35.67%