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What is the uncertainty in locating the...

What is the uncertainty in locating the position of an electron with speed `25ms^(-1)` having uncertainity of`0.1 %` ?

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Uncertainty in the speed `0.1%`
`Deltav= (0.1)/( 100) xx 25`
`Deltav=2.5xx 10^(-2) ms^(-1)`
According to Heisenberg's uncertainty principle
`Deltax xx Deltap ge (h)/(4pi)`
or `Delta x xx mDeltav gt = (h)/( 4pi)`
`Deltax ge ( h)/( 4pi m Delta v)`
`Delta x = ( 6.626 xx 10^(-34) kg m^(2) s^(-1))/( 4 xx 3.14 xx ( 9.1 xx 10^(-31) kg) xx ( 32.5 xx 10^(-2) ms^(-1)))`
`Deltax = 2.317 xx 10^(-3) m`
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