61.54% is the change from 247 to 399
Calculation steps:
[( 399 - 247 ) ÷ 247] x 100 = 61.54%
Formula
Percentage change = [(399 - 247) / 247] x 100
Subtract the new number by the original number
399 - 247 = 152
152 ÷ 247 = 0.6153846153846154
0.6153846153846154 x 100 = 61.54%