-21.95% is the change from 788 to 615
Calculation steps:
[( 615 - 788 ) ÷ 788] x 100 = -21.95%
Formula
Percentage change = [(615 - 788) / 788] x 100
Subtract the new number by the original number
615 - 788 = -173
-173 ÷ 788 = -0.21954314720812182
-0.21954314720812182 x 100 = -21.95%