-58.2% is the change from 646 to 270
Calculation steps:
[( 270 - 646 ) ÷ 646] x 100 = -58.2%
Formula
Percentage change = [(270 - 646) / 646] x 100
Subtract the new number by the original number
270 - 646 = -376
-376 ÷ 646 = -0.5820433436532507
-0.5820433436532507 x 100 = -58.2%