-66.18% is the change from 615 to 208
Calculation steps:
[( 208 - 615 ) ÷ 615] x 100 = -66.18%
Formula
Percentage change = [(208 - 615) / 615] x 100
Subtract the new number by the original number
208 - 615 = -407
-407 ÷ 615 = -0.6617886178861788
-0.6617886178861788 x 100 = -66.18%