-69.43% is the change from 615 to 188
Calculation steps:
[( 188 - 615 ) ÷ 615] x 100 = -69.43%
Formula
Percentage change = [(188 - 615) / 615] x 100
Subtract the new number by the original number
188 - 615 = -427
-427 ÷ 615 = -0.6943089430894309
-0.6943089430894309 x 100 = -69.43%