-21.3% is the change from 615 to 484
Calculation steps:
[( 484 - 615 ) ÷ 615] x 100 = -21.3%
Formula
Percentage change = [(484 - 615) / 615] x 100
Subtract the new number by the original number
484 - 615 = -131
-131 ÷ 615 = -0.21300813008130082
-0.21300813008130082 x 100 = -21.3%