-90.5% is the change from 242 to 23
Calculation steps:
[( 23 - 242 ) ÷ 242] x 100 = -90.5%
Formula
Percentage change = [(23 - 242) / 242] x 100
Subtract the new number by the original number
23 - 242 = -219
-219 ÷ 242 = -0.9049586776859504
-0.9049586776859504 x 100 = -90.5%