Subtract 1/40 from 56/42, Solve 1 14/42

Subtract 1/40 from 56/42

1^st number: 1 14/42, 2^nd number: 1/40

56/42 - 1/40 is 157/120.

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

Next, find the equivalent fraction of both fractional numbers with denominator 840
For the 1st fraction, since 42 × 20 = 840,
56/42 = 56 × 20/42 × 20 = 1120/840
Likewise, for the 2nd fraction, since 40 × 21 = 840,
1/40 = 1 × 21/40 × 21 = 21/840
Subtract the two like fractions:
1120/840 - 21/840 = 1120 - 21/840 = 1099/840
After reducing the fraction, the answer is 157/120
In mixed form: 137/120

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