261.9% is the change from 210 to 760
Calculation steps:
[( 760 - 210 ) ÷ 210] x 100 = 261.9%
Formula
Percentage change = [(760 - 210) / 210] x 100
Subtract the new number by the original number
760 - 210 = 550
550 ÷ 210 = 2.619047619047619
2.619047619047619 x 100 = 261.9%