31.9% is the change from 210 to 277
Calculation steps:
[( 277 - 210 ) ÷ 210] x 100 = 31.9%
Formula
Percentage change = [(277 - 210) / 210] x 100
Subtract the new number by the original number
277 - 210 = 67
67 ÷ 210 = 0.319047619047619
0.319047619047619 x 100 = 31.9%