-39.98% is the change from 853 to 512
Calculation steps:
[( 512 - 853 ) ÷ 853] x 100 = -39.98%
Formula
Percentage change = [(512 - 853) / 853] x 100
Subtract the new number by the original number
512 - 853 = -341
-341 ÷ 853 = -0.39976553341148885
-0.39976553341148885 x 100 = -39.98%