67.77% is the change from 394 to 661
Calculation steps:
[( 661 - 394 ) ÷ 394] x 100 = 67.77%
Formula
Percentage change = [(661 - 394) / 394] x 100
Subtract the new number by the original number
661 - 394 = 267
267 ÷ 394 = 0.6776649746192893
0.6776649746192893 x 100 = 67.77%