-91.06% is the change from 615 to 55
Calculation steps:
[( 55 - 615 ) ÷ 615] x 100 = -91.06%
Formula
Percentage change = [(55 - 615) / 615] x 100
Subtract the new number by the original number
55 - 615 = -560
-560 ÷ 615 = -0.9105691056910569
-0.9105691056910569 x 100 = -91.06%