-15.2% is the change from 921 to 781
Calculation steps:
[( 781 - 921 ) ÷ 921] x 100 = -15.2%
Formula
Percentage change = [(781 - 921) / 921] x 100
Subtract the new number by the original number
781 - 921 = -140
-140 ÷ 921 = -0.15200868621064062
-0.15200868621064062 x 100 = -15.2%