Subtract 54/80 from 15/7, Solve 2 1/7

Subtract 54/80 from 15/7

1^st number: 2 1/7, 2^nd number: 54/80

15/7 - 54/80 is 411/280.

Find the least common denominator or LCM of the two denominators:
LCM of 7 and 80 is 560

Next, find the equivalent fraction of both fractional numbers with denominator 560
For the 1st fraction, since 7 × 80 = 560,
15/7 = 15 × 80/7 × 80 = 1200/560
Likewise, for the 2nd fraction, since 80 × 7 = 560,
54/80 = 54 × 7/80 × 7 = 378/560
Subtract the two like fractions:
1200/560 - 378/560 = 1200 - 378/560 = 822/560
After reducing the fraction, the answer is 411/280
In mixed form: 1131/280

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