306.47% is the change from 170 to 691
Calculation steps:
[( 691 - 170 ) ÷ 170] x 100 = 306.47%
Formula
Percentage change = [(691 - 170) / 170] x 100
Subtract the new number by the original number
691 - 170 = 521
521 ÷ 170 = 3.0647058823529414
3.0647058823529414 x 100 = 306.47%