-70.36% is the change from 921 to 273
Calculation steps:
[( 273 - 921 ) ÷ 921] x 100 = -70.36%
Formula
Percentage change = [(273 - 921) / 921] x 100
Subtract the new number by the original number
273 - 921 = -648
-648 ÷ 921 = -0.7035830618892508
-0.7035830618892508 x 100 = -70.36%