-33.01% is the change from 918 to 615
Calculation steps:
[( 615 - 918 ) ÷ 918] x 100 = -33.01%
Formula
Percentage change = [(615 - 918) / 918] x 100
Subtract the new number by the original number
615 - 918 = -303
-303 ÷ 918 = -0.3300653594771242
-0.3300653594771242 x 100 = -33.01%