-2.57% is the change from 778 to 758
Calculation steps:
[( 758 - 778 ) ÷ 778] x 100 = -2.57%
Formula
Percentage change = [(758 - 778) / 778] x 100
Subtract the new number by the original number
758 - 778 = -20
-20 ÷ 778 = -0.02570694087403599
-0.02570694087403599 x 100 = -2.57%