124.49% is the change from 343 to 770
Calculation steps:
[( 770 - 343 ) ÷ 343] x 100 = 124.49%
Formula
Percentage change = [(770 - 343) / 343] x 100
Subtract the new number by the original number
770 - 343 = 427
427 ÷ 343 = 1.2448979591836735
1.2448979591836735 x 100 = 124.49%