-0.11% is the change from 921 to 920
Calculation steps:
[( 920 - 921 ) ÷ 921] x 100 = -0.11%
Formula
Percentage change = [(920 - 921) / 921] x 100
Subtract the new number by the original number
920 - 921 = -1
-1 ÷ 921 = -0.0010857763300760044
-0.0010857763300760044 x 100 = -0.11%