10.5% is the change from 381 to 421
Calculation steps:
[( 421 - 381 ) ÷ 381] x 100 = 10.5%
Formula
Percentage change = [(421 - 381) / 381] x 100
Subtract the new number by the original number
421 - 381 = 40
40 ÷ 381 = 0.10498687664041995
0.10498687664041995 x 100 = 10.5%