Subtract 15/42 from 70/30, Solve 2 10/30

Subtract 15/42 from 70/30

1^st number: 2 10/30, 2^nd number: 15/42

70/30 - 15/42 is 83/42.

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

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 30 × 7 = 210,
70/30 = 70 × 7/30 × 7 = 490/210
Likewise, for the 2nd fraction, since 42 × 5 = 210,
15/42 = 15 × 5/42 × 5 = 75/210
Subtract the two like fractions:
490/210 - 75/210 = 490 - 75/210 = 415/210
After reducing the fraction, the answer is 83/42
In mixed form: 141/42

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