50% is the change from 556 to 834
Calculation steps:
[( 834 - 556 ) ÷ 556] x 100 = 50%
Formula
Percentage change = [(834 - 556) / 556] x 100
Subtract the new number by the original number
834 - 556 = 278
278 ÷ 556 = 0.5
0.5 x 100 = 50%
Example