145.51% is the change from 345 to 847
Calculation steps:
[( 847 - 345 ) ÷ 345] x 100 = 145.51%
Formula
Percentage change = [(847 - 345) / 345] x 100
Subtract the new number by the original number
847 - 345 = 502
502 ÷ 345 = 1.4550724637681158
1.4550724637681158 x 100 = 145.51%