91.04% is the change from 335 to 640
Calculation steps:
[( 640 - 335 ) ÷ 335] x 100 = 91.04%
Formula
Percentage change = [(640 - 335) / 335] x 100
Subtract the new number by the original number
640 - 335 = 305
305 ÷ 335 = 0.9104477611940298
0.9104477611940298 x 100 = 91.04%