Accuracy of the result question short?

Question

We have 1/(4,5) .

When we do the divison,what accuracy does the result have?

Answer 1

I assume you're talking about significance arithmetic. When dividing numbers, "the result is rounded to the number of significant figures in the [operand] with the least significant figures." Assuming that your dividend really is $1$ (and not, say, $1.0$), then your quotient should be rounded to one significant figure. That is, $1/4.5\approx 0$. But if your dividend is, say, $1.0$, then your quotient should be rounded to two significant figures. That is, $1/4.5\approx 0.2$.