83.48% is the change from 351 to 644
Calculation steps:
[( 644 - 351 ) ÷ 351] x 100 = 83.48%
Formula
Percentage change = [(644 - 351) / 351] x 100
Subtract the new number by the original number
644 - 351 = 293
293 ÷ 351 = 0.8347578347578347
0.8347578347578347 x 100 = 83.48%