6.49% is the change from 771 to 821
Calculation steps:
[( 821 - 771 ) ÷ 771] x 100 = 6.49%
Formula
Percentage change = [(821 - 771) / 771] x 100
Subtract the new number by the original number
821 - 771 = 50
50 ÷ 771 = 0.0648508430609598
0.0648508430609598 x 100 = 6.49%