-15.42% is the change from 992 to 839
Calculation steps:
[( 839 - 992 ) ÷ 992] x 100 = -15.42%
Formula
Percentage change = [(839 - 992) / 992] x 100
Subtract the new number by the original number
839 - 992 = -153
-153 ÷ 992 = -0.15423387096774194
-0.15423387096774194 x 100 = -15.42%