-77.86% is the change from 998 to 221
Calculation steps:
[( 221 - 998 ) ÷ 998] x 100 = -77.86%
Formula
Percentage change = [(221 - 998) / 998] x 100
Subtract the new number by the original number
221 - 998 = -777
-777 ÷ 998 = -0.7785571142284569
-0.7785571142284569 x 100 = -77.86%