70.69% is the change from 481 to 821
Calculation steps:
[( 821 - 481 ) ÷ 481] x 100 = 70.69%
Formula
Percentage change = [(821 - 481) / 481] x 100
Subtract the new number by the original number
821 - 481 = 340
340 ÷ 481 = 0.7068607068607069
0.7068607068607069 x 100 = 70.69%