54.38% is the change from 434 to 670
Calculation steps:
[( 670 - 434 ) ÷ 434] x 100 = 54.38%
Formula
Percentage change = [(670 - 434) / 434] x 100
Subtract the new number by the original number
670 - 434 = 236
236 ÷ 434 = 0.543778801843318
0.543778801843318 x 100 = 54.38%