87.83% is the change from 345 to 648
Calculation steps:
[( 648 - 345 ) ÷ 345] x 100 = 87.83%
Formula
Percentage change = [(648 - 345) / 345] x 100
Subtract the new number by the original number
648 - 345 = 303
303 ÷ 345 = 0.8782608695652174
0.8782608695652174 x 100 = 87.83%