247.37% is the change from 19 to 66
Calculation steps:
[( 66 - 19 ) ÷ 19] x 100 = 247.37%
Formula
Percentage change = [(66 - 19) / 19] x 100
Subtract the new number by the original number
66 - 19 = 47
47 ÷ 19 = 2.473684210526316
2.473684210526316 x 100 = 247.37%