-30.9% is the change from 890 to 615
Calculation steps:
[( 615 - 890 ) ÷ 890] x 100 = -30.9%
Formula
Percentage change = [(615 - 890) / 890] x 100
Subtract the new number by the original number
615 - 890 = -275
-275 ÷ 890 = -0.3089887640449438
-0.3089887640449438 x 100 = -30.9%