68.38% is the change from 487 to 820
Calculation steps:
[( 820 - 487 ) ÷ 487] x 100 = 68.38%
Formula
Percentage change = [(820 - 487) / 487] x 100
Subtract the new number by the original number
820 - 487 = 333
333 ÷ 487 = 0.6837782340862423
0.6837782340862423 x 100 = 68.38%