302.5% is the change from 160 to 644
Calculation steps:
[( 644 - 160 ) ÷ 160] x 100 = 302.5%
Formula
Percentage change = [(644 - 160) / 160] x 100
Subtract the new number by the original number
644 - 160 = 484
484 ÷ 160 = 3.025
3.025 x 100 = 302.5%
Example