40.42% is the change from 668 to 938
Calculation steps:
[( 938 - 668 ) ÷ 668] x 100 = 40.42%
Formula
Percentage change = [(938 - 668) / 668] x 100
Subtract the new number by the original number
938 - 668 = 270
270 ÷ 668 = 0.4041916167664671
0.4041916167664671 x 100 = 40.42%