141.98% is the change from 343 to 830
Calculation steps:
[( 830 - 343 ) ÷ 343] x 100 = 141.98%
Formula
Percentage change = [(830 - 343) / 343] x 100
Subtract the new number by the original number
830 - 343 = 487
487 ÷ 343 = 1.4198250728862973
1.4198250728862973 x 100 = 141.98%