83.77% is the change from 345 to 634
Calculation steps:
[( 634 - 345 ) ÷ 345] x 100 = 83.77%
Formula
Percentage change = [(634 - 345) / 345] x 100
Subtract the new number by the original number
634 - 345 = 289
289 ÷ 345 = 0.8376811594202899
0.8376811594202899 x 100 = 83.77%