-18.89% is the change from 900 to 730
Calculation steps:
[( 730 - 900 ) ÷ 900] x 100 = -18.89%
Formula
Percentage change = [(730 - 900) / 900] x 100
Subtract the new number by the original number
730 - 900 = -170
-170 ÷ 900 = -0.18888888888888888
-0.18888888888888888 x 100 = -18.89%