40 ನಿಮಿಷವು ಒಂದು ಗಂಟೆಯ ಎಷ್ಟನೇ ಭಾಗ?

Step 1: Understand the units involved. The question asks to express $40$ minutes as a fraction of an hour. We know that $1$ hour is equal to $60$ minutes.

Step 2: Set up the fraction. To find what fraction $40$ minutes is of an hour, we put the given minutes over the total minutes in an hour. $\text{Fraction} = \frac{Given minutes}{Total minutes in an hour}$ $\text{Fraction} = \frac{40}{60}$

Step 3: Simplify the fraction. Divide both the numerator and the denominator by their greatest common divisor. Both $40$ and $60$ are divisible by $20$. $\frac{40}{60} = \frac{40 \div 20}{60 \div 20}$ $\frac{40}{60} = \frac{2}{3}$

So, $40$ minutes is $\frac{2}{3}$ of an hour.

The fraction is $\boxed{\frac{2}{3}}$.