Just trying to solve a questions

Assume total company stocks to be x

You owe 40% i.e 0.40x

If your increase your stocks by 3% = 3/100 x 0.4x = 0.012x

Total stocks you own now = 0.4x + 0.012x = 0.412x

Total percent yo own now = 0.412x/x * 100 = 41.2%

:)