-74.7% is the change from 921 to 233
Calculation steps:
[( 233 - 921 ) ÷ 921] x 100 = -74.7%
Formula
Percentage change = [(233 - 921) / 921] x 100
Subtract the new number by the original number
233 - 921 = -688
-688 ÷ 921 = -0.747014115092291
-0.747014115092291 x 100 = -74.7%