Question

a classmate says that 3/5 is < 4/7 because 3 is less than 4 describe and correct the error

Answer 1

to know which fraction is bigger, u need to either same numerator or denominator.
so, how to make them have same denominator:
times both of the fraction's numerator and denominator with same number. You won't change the value of the fraction, u just make the ration number look bigger or smaller

like 3/5 and 4/7

3/5 change to 21/35 (both times 7)
4/7 change to 20/35(both times 5)

hence 3/5 is bigger than 4/7
same denominator, bigger numerator fraction mean greater value


If same numerator, but different in denominator, bigger denominator mean smaller value