-63.47% is the change from 646 to 236
Calculation steps:
[( 236 - 646 ) ÷ 646] x 100 = -63.47%
Formula
Percentage change = [(236 - 646) / 646] x 100
Subtract the new number by the original number
236 - 646 = -410
-410 ÷ 646 = -0.6346749226006192
-0.6346749226006192 x 100 = -63.47%