72.05% is the change from 390 to 671
Calculation steps:
[( 671 - 390 ) ÷ 390] x 100 = 72.05%
Formula
Percentage change = [(671 - 390) / 390] x 100
Subtract the new number by the original number
671 - 390 = 281
281 ÷ 390 = 0.7205128205128205
0.7205128205128205 x 100 = 72.05%