-37.77% is the change from 646 to 402
Calculation steps:
[( 402 - 646 ) ÷ 646] x 100 = -37.77%
Formula
Percentage change = [(402 - 646) / 646] x 100
Subtract the new number by the original number
402 - 646 = -244
-244 ÷ 646 = -0.37770897832817335
-0.37770897832817335 x 100 = -37.77%