39.91% is the change from 669 to 936
Calculation steps:
[( 936 - 669 ) ÷ 669] x 100 = 39.91%
Formula
Percentage change = [(936 - 669) / 669] x 100
Subtract the new number by the original number
936 - 669 = 267
267 ÷ 669 = 0.3991031390134529
0.3991031390134529 x 100 = 39.91%