-73.72% is the change from 921 to 242
Calculation steps:
[( 242 - 921 ) ÷ 921] x 100 = -73.72%
Formula
Percentage change = [(242 - 921) / 921] x 100
Subtract the new number by the original number
242 - 921 = -679
-679 ÷ 921 = -0.7372421281216069
-0.7372421281216069 x 100 = -73.72%