# How to calculate value of expressions when a = 22 Round the answer to three significant fig

How to calculate value of expressions when $a=22$
Round the answer to three significant figures:
$\frac{77}{3a}$
for this one I am not sure if I do $\frac{77}{3\left(22\right)}=1.17$ or $\frac{77}{3\left(22\right)}=56$
Sorry if this is written in a confusing way.
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$\frac{77}{3a}$ means you will just replace $a$ in the formula with $22$.
Therefore, $\frac{77}{3\ast 22}$ or, when rounded to 3 significant figures, $1.17$
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aangenaamyj
$\frac{77}{3a}=\frac{77}{3\cdot 22}=\frac{7\cdot 11}{3\cdot 2\cdot 11}=\frac{7\cdot \text{⧸}11}{3\cdot 2\cdot \text{⧸}11}=\frac{7}{6}=1+\frac{1}{6}=1.167$