-73.62% is the change from 921 to 243
Calculation steps:
[( 243 - 921 ) ÷ 921] x 100 = -73.62%
Formula
Percentage change = [(243 - 921) / 921] x 100
Subtract the new number by the original number
243 - 921 = -678
-678 ÷ 921 = -0.7361563517915309
-0.7361563517915309 x 100 = -73.62%