Subtract 5/70 from 18/15, Solve 1 3/15

Subtract 5/70 from 18/15

1^st number: 1 3/15, 2^nd number: 5/70

18/15 - 5/70 is 79/70.

Find the least common denominator or LCM of the two denominators:
LCM of 15 and 70 is 210

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 15 × 14 = 210,
18/15 = 18 × 14/15 × 14 = 252/210
Likewise, for the 2nd fraction, since 70 × 3 = 210,
5/70 = 5 × 3/70 × 3 = 15/210
Subtract the two like fractions:
252/210 - 15/210 = 252 - 15/210 = 237/210
After reducing the fraction, the answer is 79/70
In mixed form: 19/70

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