The mixed number 280 1/4 written as an improper fraction is 1121/4
To turn the mixed number 280 1/4 into an improper fraction, use these simple steps:
First, multiply the whole number by the denominator of the fractional part: 280 × 4 = 1120.
After that, add the result to the numerator of the fractional part: 1120 + 1 = 1121.
Next, Write the sum of the previous step on the original denominator: 1121/4.
This means that 280 1/4, as an improper fraction, equals 1121/4.
See also: 280 1/4 as a decimal