-75.44% is the change from 900 to 221
Calculation steps:
[( 221 - 900 ) ÷ 900] x 100 = -75.44%
Formula
Percentage change = [(221 - 900) / 900] x 100
Subtract the new number by the original number
221 - 900 = -679
-679 ÷ 900 = -0.7544444444444445
-0.7544444444444445 x 100 = -75.44%