31.4% is the change from 516 to 678
Calculation steps:
[( 678 - 516 ) ÷ 516] x 100 = 31.4%
Formula
Percentage change = [(678 - 516) / 516] x 100
Subtract the new number by the original number
678 - 516 = 162
162 ÷ 516 = 0.313953488372093
0.313953488372093 x 100 = 31.4%