100.3% is the change from 331 to 663
Calculation steps:
[( 663 - 331 ) ÷ 331] x 100 = 100.3%
Formula
Percentage change = [(663 - 331) / 331] x 100
Subtract the new number by the original number
663 - 331 = 332
332 ÷ 331 = 1.0030211480362539
1.0030211480362539 x 100 = 100.3%