Round 4 and 3/8 to the nearest whole number.

Here we know the lower option will be 4, and that as our numerator is smaller than our denominator, or higher whole number to round to will be 5. Between 4 and 5 the halfway point is 4/8 as 4 is half of eight, and so, as 4 3/8 is below 4 4/8, it rounds to 4, not 5.