121.45% is the change from 387 to 857
Calculation steps:
[( 857 - 387 ) ÷ 387] x 100 = 121.45%
Formula
Percentage change = [(857 - 387) / 387] x 100
Subtract the new number by the original number
857 - 387 = 470
470 ÷ 387 = 1.2144702842377262
1.2144702842377262 x 100 = 121.45%