31.66% is the change from 319 to 420
Calculation steps:
[( 420 - 319 ) ÷ 319] x 100 = 31.66%
Formula
Percentage change = [(420 - 319) / 319] x 100
Subtract the new number by the original number
420 - 319 = 101
101 ÷ 319 = 0.3166144200626959
0.3166144200626959 x 100 = 31.66%