68.58% is the change from 487 to 821
Calculation steps:
[( 821 - 487 ) ÷ 487] x 100 = 68.58%
Formula
Percentage change = [(821 - 487) / 487] x 100
Subtract the new number by the original number
821 - 487 = 334
334 ÷ 487 = 0.6858316221765913
0.6858316221765913 x 100 = 68.58%