-9.92% is the change from 242 to 218
Calculation steps:
[( 218 - 242 ) ÷ 242] x 100 = -9.92%
Formula
Percentage change = [(218 - 242) / 242] x 100
Subtract the new number by the original number
218 - 242 = -24
-24 ÷ 242 = -0.09917355371900827
-0.09917355371900827 x 100 = -9.92%