86.47% is the change from 340 to 634
Calculation steps:
[( 634 - 340 ) ÷ 340] x 100 = 86.47%
Formula
Percentage change = [(634 - 340) / 340] x 100
Subtract the new number by the original number
634 - 340 = 294
294 ÷ 340 = 0.8647058823529412
0.8647058823529412 x 100 = 86.47%