-57.72% is the change from 615 to 260
Calculation steps:
[( 260 - 615 ) ÷ 615] x 100 = -57.72%
Formula
Percentage change = [(260 - 615) / 615] x 100
Subtract the new number by the original number
260 - 615 = -355
-355 ÷ 615 = -0.5772357723577236
-0.5772357723577236 x 100 = -57.72%