54.8% is the change from 250 to 387
Calculation steps:
[( 387 - 250 ) ÷ 250] x 100 = 54.8%
Formula
Percentage change = [(387 - 250) / 250] x 100
Subtract the new number by the original number
387 - 250 = 137
137 ÷ 250 = 0.548
0.548 x 100 = 54.8%
Example