-21.72% is the change from 778 to 609
Calculation steps:
[( 609 - 778 ) ÷ 778] x 100 = -21.72%
Formula
Percentage change = [(609 - 778) / 778] x 100
Subtract the new number by the original number
609 - 778 = -169
-169 ÷ 778 = -0.21722365038560412
-0.21722365038560412 x 100 = -21.72%