248.97% is the change from 145 to 506
Calculation steps:
[( 506 - 145 ) ÷ 145] x 100 = 248.97%
Formula
Percentage change = [(506 - 145) / 145] x 100
Subtract the new number by the original number
506 - 145 = 361
361 ÷ 145 = 2.489655172413793
2.489655172413793 x 100 = 248.97%