-19.87% is the change from 921 to 738
Calculation steps:
[( 738 - 921 ) ÷ 921] x 100 = -19.87%
Formula
Percentage change = [(738 - 921) / 921] x 100
Subtract the new number by the original number
738 - 921 = -183
-183 ÷ 921 = -0.1986970684039088
-0.1986970684039088 x 100 = -19.87%