Answer: 71/28 or 2 15/28
Step-by-step explanation:
Turn both fractions into improper fractions.
5 1/4 = 21/4
2 5/7 = 19/7 multiply the denominator with the whole then add the numerator, same denominator.
21/4 - 19/7 = ? find common denominator to subtract
4 x 7 = 28 common denominator
Divide the new denominator by previous denominators then multiply by each respective numerator. 28 divided by 4 is 7 multiplied by 21 is 147, the same happens with 19/7.
147/28 - 76/28 = 71/28 or 2 15/28
