The learner divided only the numerator by \(10\), making the quotient ten times smaller instead of keeping it equal.

Divide both numerator and denominator by \(10\): \(\displaystyle \frac{48.6}{30}=\frac{4.86}{3}\).

Now \(4.86\div3=1.62\). Check: \(1.62\times30=48.6\).

Answer

\(\displaystyle \frac{48.6}{30}=\frac{4.86}{3}=1.62\).