As Marcus says, the devil is often in the details in cases like this, “some decimal point in the wrong place.”
decimal three-fifty or thereabouts I fancy from the look of it.
One was really beautiful, allowing a decimal point off her nose.
In this case the constant is designated by the decimal .005.
That seemed to be typical; the frontiers of science, now, were all decimal points.
He was a mathematician as far as long division and decimal fractions.
It was he who first carried the computation of π to 35 decimal places.
The Duke has got some craze of his own about decimal coinage.
Proof of this is found in the wide extended use of the decimal system.
From these, as is well known, our decimal notation is derived.
c.1600, from Medeival Latin decimalis "of tithes or tenths," from Latin decimus "tenth," from decem "ten" (see ten). Applied to Arabic notation before modern sense of "decimal fractions" emerged. As a noun from 1640s.