-67.78% is the change from 838 to 270
Calculation steps:
[( 270 - 838 ) ÷ 838] x 100 = -67.78%
Formula
Percentage change = [(270 - 838) / 838] x 100
Subtract the new number by the original number
270 - 838 = -568
-568 ÷ 838 = -0.6778042959427207
-0.6778042959427207 x 100 = -67.78%