89.18% is the change from 342 to 647
Calculation steps:
[( 647 - 342 ) ÷ 342] x 100 = 89.18%
Formula
Percentage change = [(647 - 342) / 342] x 100
Subtract the new number by the original number
647 - 342 = 305
305 ÷ 342 = 0.8918128654970761
0.8918128654970761 x 100 = 89.18%