50% is the change from 516 to 774
Calculation steps:
[( 774 - 516 ) ÷ 516] x 100 = 50%
Formula
Percentage change = [(774 - 516) / 516] x 100
Subtract the new number by the original number
774 - 516 = 258
258 ÷ 516 = 0.5
0.5 x 100 = 50%
Example