Subtract 15/3 from 7/70, Solve 7/70

Subtract 15/3 from 7/70

1^st number: 7/70, 2^nd number: 5 0/3

7/70 - 15/3 is -49/10.

Find the least common denominator or LCM of the two denominators:
LCM of 70 and 3 is 210

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 70 × 3 = 210,
7/70 = 7 × 3/70 × 3 = 21/210
Likewise, for the 2nd fraction, since 3 × 70 = 210,
15/3 = 15 × 70/3 × 70 = 1050/210
Subtract the two like fractions:
21/210 - 1050/210 = 21 - 1050/210 = -1029/210
After reducing the fraction, the answer is -49/10

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