124.78% is the change from 343 to 771
Calculation steps:
[( 771 - 343 ) ÷ 343] x 100 = 124.78%
Formula
Percentage change = [(771 - 343) / 343] x 100
Subtract the new number by the original number
771 - 343 = 428
428 ÷ 343 = 1.2478134110787171
1.2478134110787171 x 100 = 124.78%