Subtract 9/3 from 42/70, Solve 42/70

Subtract 9/3 from 42/70

1^st number: 42/70, 2^nd number: 3 0/3

42/70 - 9/3 is -12/5.

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,
42/70 = 42 × 3/70 × 3 = 126/210
Likewise, for the 2nd fraction, since 3 × 70 = 210,
9/3 = 9 × 70/3 × 70 = 630/210
Subtract the two like fractions:
126/210 - 630/210 = 126 - 630/210 = -504/210
After reducing the fraction, the answer is -12/5

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