36.05% is the change from 491 to 668
Calculation steps:
[( 668 - 491 ) ÷ 491] x 100 = 36.05%
Formula
Percentage change = [(668 - 491) / 491] x 100
Subtract the new number by the original number
668 - 491 = 177
177 ÷ 491 = 0.3604887983706721
0.3604887983706721 x 100 = 36.05%