-12.4% is the change from 242 to 212
Calculation steps:
[( 212 - 242 ) ÷ 242] x 100 = -12.4%
Formula
Percentage change = [(212 - 242) / 242] x 100
Subtract the new number by the original number
212 - 242 = -30
-30 ÷ 242 = -0.12396694214876033
-0.12396694214876033 x 100 = -12.4%