-26.97% is the change from 849 to 620
Calculation steps:
[( 620 - 849 ) ÷ 849] x 100 = -26.97%
Formula
Percentage change = [(620 - 849) / 849] x 100
Subtract the new number by the original number
620 - 849 = -229
-229 ÷ 849 = -0.2697290930506478
-0.2697290930506478 x 100 = -26.97%