161.54% is the change from 247 to 646
Calculation steps:
[( 646 - 247 ) ÷ 247] x 100 = 161.54%
Formula
Percentage change = [(646 - 247) / 247] x 100
Subtract the new number by the original number
646 - 247 = 399
399 ÷ 247 = 1.6153846153846154
1.6153846153846154 x 100 = 161.54%