287% is the change from 100 to 387
Calculation steps:
[( 387 - 100 ) ÷ 100] x 100 = 287%
Formula
Percentage change = [(387 - 100) / 100] x 100
Subtract the new number by the original number
387 - 100 = 287
287 ÷ 100 = 2.87
2.87 x 100 = 287%
Example