-21.25% is the change from 781 to 615
Calculation steps:
[( 615 - 781 ) ÷ 781] x 100 = -21.25%
Formula
Percentage change = [(615 - 781) / 781] x 100
Subtract the new number by the original number
615 - 781 = -166
-166 ÷ 781 = -0.21254801536491677
-0.21254801536491677 x 100 = -21.25%