105.92% is the change from 321 to 661
Calculation steps:
[( 661 - 321 ) ÷ 321] x 100 = 105.92%
Formula
Percentage change = [(661 - 321) / 321] x 100
Subtract the new number by the original number
661 - 321 = 340
340 ÷ 321 = 1.0591900311526479
1.0591900311526479 x 100 = 105.92%