Express \(3\dfrac{2}{5}\) as a decimal.
\(3.4\)
Step 1: Split the mixed number into a whole part and a fraction.
Whole part: \(3\)
Fraction part: \(\dfrac{2}{5}\)
Step 2: Convert the fraction to a decimal.
First: \(1 \div 5 = 0.2\)
Then: \(2 \times 0.2 = 0.4\)
So, \(\dfrac{2}{5} = 0.4\)
Step 3: Add the whole part and the decimal part.
\(3 + 0.4 = 3.4\)
Therefore, \(3\dfrac{2}{5} = 3.4\)