-90.08% is the change from 242 to 24
Calculation steps:
[( 24 - 242 ) ÷ 242] x 100 = -90.08%
Formula
Percentage change = [(24 - 242) / 242] x 100
Subtract the new number by the original number
24 - 242 = -218
-218 ÷ 242 = -0.9008264462809917
-0.9008264462809917 x 100 = -90.08%