-65.98% is the change from 820 to 279
Calculation steps:
[( 279 - 820 ) ÷ 820] x 100 = -65.98%
Formula
Percentage change = [(279 - 820) / 820] x 100
Subtract the new number by the original number
279 - 820 = -541
-541 ÷ 820 = -0.6597560975609756
-0.6597560975609756 x 100 = -65.98%