Answer:
..we put in the common denominator, we classify them according to their numerator in ascending order
denominator: 40
2/5 =(8*2)/(5*8)=16/40
1/4=(1*10)/(4*10)=10/40
3/8 =(3*5)/(8*5)= 15/40
List least to greatest:
1/4; 3/8; 2/5
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