199.64% is the change from 277 to 830
Calculation steps:
[( 830 - 277 ) ÷ 277] x 100 = 199.64%
Formula
Percentage change = [(830 - 277) / 277] x 100
Subtract the new number by the original number
830 - 277 = 553
553 ÷ 277 = 1.9963898916967509
1.9963898916967509 x 100 = 199.64%