Subtract 6/42 from 49/40, Solve 1 9/40

Subtract 6/42 from 49/40

1^st number: 1 9/40, 2^nd number: 6/42

49/40 - 6/42 is 303/280.

Find the least common denominator or LCM of the two denominators:
LCM of 40 and 42 is 840

Next, find the equivalent fraction of both fractional numbers with denominator 840
For the 1st fraction, since 40 × 21 = 840,
49/40 = 49 × 21/40 × 21 = 1029/840
Likewise, for the 2nd fraction, since 42 × 20 = 840,
6/42 = 6 × 20/42 × 20 = 120/840
Subtract the two like fractions:
1029/840 - 120/840 = 1029 - 120/840 = 909/840
After reducing the fraction, the answer is 303/280
In mixed form: 123/280

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