Subtract 25/7 from 10/80, Solve 10/80

Subtract 25/7 from 10/80

1^st number: 10/80, 2^nd number: 3 4/7

10/80 - 25/7 is -193/56.

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

Next, find the equivalent fraction of both fractional numbers with denominator 560
For the 1st fraction, since 80 × 7 = 560,
10/80 = 10 × 7/80 × 7 = 70/560
Likewise, for the 2nd fraction, since 7 × 80 = 560,
25/7 = 25 × 80/7 × 80 = 2000/560
Subtract the two like fractions:
70/560 - 2000/560 = 70 - 2000/560 = -1930/560
After reducing the fraction, the answer is -193/56

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