150% is the change from 248 to 620
Calculation steps:
[( 620 - 248 ) ÷ 248] x 100 = 150%
Formula
Percentage change = [(620 - 248) / 248] x 100
Subtract the new number by the original number
620 - 248 = 372
372 ÷ 248 = 1.5
1.5 x 100 = 150%
Example