38.6% is the change from 715 to 991
Calculation steps:
[( 991 - 715 ) ÷ 715] x 100 = 38.6%
Formula
Percentage change = [(991 - 715) / 715] x 100
Subtract the new number by the original number
991 - 715 = 276
276 ÷ 715 = 0.386013986013986
0.386013986013986 x 100 = 38.6%