-33.15% is the change from 920 to 615
Calculation steps:
[( 615 - 920 ) ÷ 920] x 100 = -33.15%
Formula
Percentage change = [(615 - 920) / 920] x 100
Subtract the new number by the original number
615 - 920 = -305
-305 ÷ 920 = -0.33152173913043476
-0.33152173913043476 x 100 = -33.15%