50% is the change from 434 to 651
Calculation steps:
[( 651 - 434 ) ÷ 434] x 100 = 50%
Formula
Percentage change = [(651 - 434) / 434] x 100
Subtract the new number by the original number
651 - 434 = 217
217 ÷ 434 = 0.5
0.5 x 100 = 50%
Example