-21.56% is the change from 784 to 615
Calculation steps:
[( 615 - 784 ) ÷ 784] x 100 = -21.56%
Formula
Percentage change = [(615 - 784) / 784] x 100
Subtract the new number by the original number
615 - 784 = -169
-169 ÷ 784 = -0.21556122448979592
-0.21556122448979592 x 100 = -21.56%