Subtract 15/9 from 75/70, Solve 1 5/70

Subtract 15/9 from 75/70

1^st number: 1 5/70, 2^nd number: 1 6/9

75/70 - 15/9 is -25/42.

Find the least common denominator or LCM of the two denominators:
LCM of 70 and 9 is 630

Next, find the equivalent fraction of both fractional numbers with denominator 630
For the 1st fraction, since 70 × 9 = 630,
75/70 = 75 × 9/70 × 9 = 675/630
Likewise, for the 2nd fraction, since 9 × 70 = 630,
15/9 = 15 × 70/9 × 70 = 1050/630
Subtract the two like fractions:
675/630 - 1050/630 = 675 - 1050/630 = -375/630
After reducing the fraction, the answer is -25/42

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