Subtract 3/30 from 70/42, Solve 1 28/42

Subtract 3/30 from 70/42

1^st number: 1 28/42, 2^nd number: 3/30

70/42 - 3/30 is 47/30.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 30 is 210

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 42 × 5 = 210,
70/42 = 70 × 5/42 × 5 = 350/210
Likewise, for the 2nd fraction, since 30 × 7 = 210,
3/30 = 3 × 7/30 × 7 = 21/210
Subtract the two like fractions:
350/210 - 21/210 = 350 - 21/210 = 329/210
After reducing the fraction, the answer is 47/30
In mixed form: 117/30

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