21.45% is the change from 331 to 402
Calculation steps:
[( 402 - 331 ) ÷ 331] x 100 = 21.45%
Formula
Percentage change = [(402 - 331) / 331] x 100
Subtract the new number by the original number
402 - 331 = 71
71 ÷ 331 = 0.21450151057401812
0.21450151057401812 x 100 = 21.45%