-13.17% is the change from 615 to 534
Calculation steps:
[( 534 - 615 ) ÷ 615] x 100 = -13.17%
Formula
Percentage change = [(534 - 615) / 615] x 100
Subtract the new number by the original number
534 - 615 = -81
-81 ÷ 615 = -0.13170731707317074
-0.13170731707317074 x 100 = -13.17%