15.35% is the change from 821 to 947
Calculation steps:
[( 947 - 821 ) ÷ 821] x 100 = 15.35%
Formula
Percentage change = [(947 - 821) / 821] x 100
Subtract the new number by the original number
947 - 821 = 126
126 ÷ 821 = 0.15347137637028013
0.15347137637028013 x 100 = 15.35%