70.05% is the change from 394 to 670
Calculation steps:
[( 670 - 394 ) ÷ 394] x 100 = 70.05%
Formula
Percentage change = [(670 - 394) / 394] x 100
Subtract the new number by the original number
670 - 394 = 276
276 ÷ 394 = 0.700507614213198
0.700507614213198 x 100 = 70.05%