-27.4% is the change from 770 to 559
Calculation steps:
[( 559 - 770 ) ÷ 770] x 100 = -27.4%
Formula
Percentage change = [(559 - 770) / 770] x 100
Subtract the new number by the original number
559 - 770 = -211
-211 ÷ 770 = -0.274025974025974
-0.274025974025974 x 100 = -27.4%