81.58% is the change from 380 to 690
Calculation steps:
[( 690 - 380 ) ÷ 380] x 100 = 81.58%
Formula
Percentage change = [(690 - 380) / 380] x 100
Subtract the new number by the original number
690 - 380 = 310
310 ÷ 380 = 0.8157894736842105
0.8157894736842105 x 100 = 81.58%