-45.25% is the change from 221 to 121
Calculation steps:
[( 121 - 221 ) ÷ 221] x 100 = -45.25%
Formula
Percentage change = [(121 - 221) / 221] x 100
Subtract the new number by the original number
121 - 221 = -100
-100 ÷ 221 = -0.45248868778280543
-0.45248868778280543 x 100 = -45.25%