Subtract 2/40 from 28/8, Solve 3 4/8

Subtract 2/40 from 28/8

1^st number: 3 4/8, 2^nd number: 2/40

28/8 - 2/40 is 69/20.

Find the least common denominator or LCM of the two denominators:
LCM of 8 and 40 is 40

Next, find the equivalent fraction of both fractional numbers with denominator 40
For the 1st fraction, since 8 × 5 = 40,
28/8 = 28 × 5/8 × 5 = 140/40
Likewise, for the 2nd fraction, since 40 × 1 = 40,
2/40 = 2 × 1/40 × 1 = 2/40
Subtract the two like fractions:
140/40 - 2/40 = 140 - 2/40 = 138/40
After reducing the fraction, the answer is 69/20
In mixed form: 39/20

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