-26.52% is the change from 837 to 615
Calculation steps:
[( 615 - 837 ) ÷ 837] x 100 = -26.52%
Formula
Percentage change = [(615 - 837) / 837] x 100
Subtract the new number by the original number
615 - 837 = -222
-222 ÷ 837 = -0.26523297491039427
-0.26523297491039427 x 100 = -26.52%