161.86% is the change from 312 to 817
Calculation steps:
[( 817 - 312 ) ÷ 312] x 100 = 161.86%
Formula
Percentage change = [(817 - 312) / 312] x 100
Subtract the new number by the original number
817 - 312 = 505
505 ÷ 312 = 1.6185897435897436
1.6185897435897436 x 100 = 161.86%