Subtract 15/40 from 90/14, Solve 6 6/14

Subtract 15/40 from 90/14

1^st number: 6 6/14, 2^nd number: 15/40

90/14 - 15/40 is 339/56.

Find the least common denominator or LCM of the two denominators:
LCM of 14 and 40 is 280

Next, find the equivalent fraction of both fractional numbers with denominator 280
For the 1st fraction, since 14 × 20 = 280,
90/14 = 90 × 20/14 × 20 = 1800/280
Likewise, for the 2nd fraction, since 40 × 7 = 280,
15/40 = 15 × 7/40 × 7 = 105/280
Subtract the two like fractions:
1800/280 - 105/280 = 1800 - 105/280 = 1695/280
After reducing the fraction, the answer is 339/56
In mixed form: 63/56

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