200% is the change from 258 to 774
Calculation steps:
[( 774 - 258 ) ÷ 258] x 100 = 200%
Formula
Percentage change = [(774 - 258) / 258] x 100
Subtract the new number by the original number
774 - 258 = 516
516 ÷ 258 = 2
2 x 100 = 200%
Example