-12.68% is the change from 615 to 537
Calculation steps:
[( 537 - 615 ) ÷ 615] x 100 = -12.68%
Formula
Percentage change = [(537 - 615) / 615] x 100
Subtract the new number by the original number
537 - 615 = -78
-78 ÷ 615 = -0.12682926829268293
-0.12682926829268293 x 100 = -12.68%