39.4% is the change from 670 to 934
Calculation steps:
[( 934 - 670 ) ÷ 670] x 100 = 39.4%
Formula
Percentage change = [(934 - 670) / 670] x 100
Subtract the new number by the original number
934 - 670 = 264
264 ÷ 670 = 0.3940298507462687
0.3940298507462687 x 100 = 39.4%