-21.84% is the change from 998 to 780
Calculation steps:
[( 780 - 998 ) ÷ 998] x 100 = -21.84%
Formula
Percentage change = [(780 - 998) / 998] x 100
Subtract the new number by the original number
780 - 998 = -218
-218 ÷ 998 = -0.218436873747495
-0.218436873747495 x 100 = -21.84%