-69.99% is the change from 853 to 256
Calculation steps:
[( 256 - 853 ) ÷ 853] x 100 = -69.99%
Formula
Percentage change = [(256 - 853) / 853] x 100
Subtract the new number by the original number
256 - 853 = -597
-597 ÷ 853 = -0.6998827667057445
-0.6998827667057445 x 100 = -69.99%