243.3% is the change from 194 to 666
Calculation steps:
[( 666 - 194 ) ÷ 194] x 100 = 243.3%
Formula
Percentage change = [(666 - 194) / 194] x 100
Subtract the new number by the original number
666 - 194 = 472
472 ÷ 194 = 2.4329896907216493
2.4329896907216493 x 100 = 243.3%