271.43% is the change from 210 to 780
Calculation steps:
[( 780 - 210 ) ÷ 210] x 100 = 271.43%
Formula
Percentage change = [(780 - 210) / 210] x 100
Subtract the new number by the original number
780 - 210 = 570
570 ÷ 210 = 2.7142857142857144
2.7142857142857144 x 100 = 271.43%