-2.54% is the change from 945 to 921
Calculation steps:
[( 921 - 945 ) ÷ 945] x 100 = -2.54%
Formula
Percentage change = [(921 - 945) / 945] x 100
Subtract the new number by the original number
921 - 945 = -24
-24 ÷ 945 = -0.025396825396825397
-0.025396825396825397 x 100 = -2.54%