-11.16% is the change from 242 to 215
Calculation steps:
[( 215 - 242 ) ÷ 242] x 100 = -11.16%
Formula
Percentage change = [(215 - 242) / 242] x 100
Subtract the new number by the original number
215 - 242 = -27
-27 ÷ 242 = -0.1115702479338843
-0.1115702479338843 x 100 = -11.16%