Answer:
- <em>convert </em>the mixed fractions to improper fractions (where the numerator is greater than or equal to the denominator): multiply the whole number part by the fraction's denominator, add that to the numerator, write the result on top of the denominator.
- if the denominators are not the same, work out the common denominator and <em>rewrite </em>the fractions with the same denominators
- subtract by subtracting the numerators and writing the result over the denominator
- convert back to mixed fractions by dividing the numerator by the denominator, write down the whole number answer, write down the remainder above the denominator.
Example

convert to improper fractions:

common denominator = 3 × 5 = 15, so:

subtract:

convert back to mixed fractions:

Answer: C, 3 HOURS
Step-by-step explanation:
she canoed for 1 hour and windsurfed for 2 hours
Answer: The answer is C = -P + R
32.17/7 =
about 4.59571428571429
are there any instructions on rounding it to the nearest tenth, hundredths, etc.?