Answer:
\(20\frac{4}{5}\) hours
Step-by-step explanation:
If 1 wall takes \(2\frac{3}{5}\) hours to paint,
8 walls would take \(2\frac{3}{5}*8\) hours to paint [given same rate].
Changing \(2\frac{3}{5}\) into improper fraction [for ease of multiplying]:
\(2\frac{3}{5}=\frac{13}{5}\)
Now multiplying \(\frac{13}{5}\) with 8 gives us:
\(\frac{13}{5}*8=\frac{104}{5}\) hours
In decimal it is \(\frac{104}{5}=20.8\) hours
