44.8% is the change from 221 to 320
Calculation steps:
[( 320 - 221 ) ÷ 221] x 100 = 44.8%
Formula
Percentage change = [(320 - 221) / 221] x 100
Subtract the new number by the original number
320 - 221 = 99
99 ÷ 221 = 0.4479638009049774
0.4479638009049774 x 100 = 44.8%