170.59% is the change from 255 to 690
Calculation steps:
[( 690 - 255 ) ÷ 255] x 100 = 170.59%
Formula
Percentage change = [(690 - 255) / 255] x 100
Subtract the new number by the original number
690 - 255 = 435
435 ÷ 255 = 1.7058823529411764
1.7058823529411764 x 100 = 170.59%