-74.3% is the change from 642 to 165
Calculation steps:
[( 165 - 642 ) ÷ 642] x 100 = -74.3%
Formula
Percentage change = [(165 - 642) / 642] x 100
Subtract the new number by the original number
165 - 642 = -477
-477 ÷ 642 = -0.7429906542056075
-0.7429906542056075 x 100 = -74.3%