-20.54% is the change from 774 to 615
Calculation steps:
[( 615 - 774 ) ÷ 774] x 100 = -20.54%
Formula
Percentage change = [(615 - 774) / 774] x 100
Subtract the new number by the original number
615 - 774 = -159
-159 ÷ 774 = -0.2054263565891473
-0.2054263565891473 x 100 = -20.54%