191.47% is the change from 340 to 991
Calculation steps:
[( 991 - 340 ) ÷ 340] x 100 = 191.47%
Formula
Percentage change = [(991 - 340) / 340] x 100
Subtract the new number by the original number
991 - 340 = 651
651 ÷ 340 = 1.9147058823529413
1.9147058823529413 x 100 = 191.47%