Subtract 70/30 from 5/7, Solve 5/7 - 2 10/30 as a fraction

Subtract 70/30 from 5/7

1^st number: 5/7, 2^nd number: 2 10/30

5/7 - 70/30 is -34/21.

Find the least common denominator or LCM of the two denominators:
LCM of 7 and 30 is 210

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 7 × 30 = 210,
5/7 = 5 × 30/7 × 30 = 150/210
Likewise, for the 2nd fraction, since 30 × 7 = 210,
70/30 = 70 × 7/30 × 7 = 490/210
Subtract the two like fractions:
150/210 - 490/210 = 150 - 490/210 = -340/210
After reducing the fraction, the answer is -34/21

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