-74.46% is the change from 646 to 165
Calculation steps:
[( 165 - 646 ) ÷ 646] x 100 = -74.46%
Formula
Percentage change = [(165 - 646) / 646] x 100
Subtract the new number by the original number
165 - 646 = -481
-481 ÷ 646 = -0.7445820433436533
-0.7445820433436533 x 100 = -74.46%