-34.89% is the change from 986 to 642
Calculation steps:
[( 642 - 986 ) ÷ 986] x 100 = -34.89%
Formula
Percentage change = [(642 - 986) / 986] x 100
Subtract the new number by the original number
642 - 986 = -344
-344 ÷ 986 = -0.3488843813387424
-0.3488843813387424 x 100 = -34.89%