1257.14% is the change from 49 to 665
Calculation steps:
[( 665 - 49 ) ÷ 49] x 100 = 1257.14%
Formula
Percentage change = [(665 - 49) / 49] x 100
Subtract the new number by the original number
665 - 49 = 616
616 ÷ 49 = 12.571428571428571
12.571428571428571 x 100 = 1257.14%