Subtract 70/49 from 7/10, Solve 7/10

Subtract 70/49 from 7/10

1^st number: 7/10, 2^nd number: 1 21/49

7/10 - 70/49 is -51/70.

Find the least common denominator or LCM of the two denominators:
LCM of 10 and 49 is 490

Next, find the equivalent fraction of both fractional numbers with denominator 490
For the 1st fraction, since 10 × 49 = 490,
7/10 = 7 × 49/10 × 49 = 343/490
Likewise, for the 2nd fraction, since 49 × 10 = 490,
70/49 = 70 × 10/49 × 10 = 700/490
Subtract the two like fractions:
343/490 - 700/490 = 343 - 700/490 = -357/490
After reducing the fraction, the answer is -51/70

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