Subtract 7/42 from 15/5, Solve 3 0/5

Subtract 7/42 from 15/5

1^st number: 3 0/5, 2^nd number: 7/42

15/5 - 7/42 is 17/6.

Find the least common denominator or LCM of the two denominators:
LCM of 5 and 42 is 210

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 5 × 42 = 210,
15/5 = 15 × 42/5 × 42 = 630/210
Likewise, for the 2nd fraction, since 42 × 5 = 210,
7/42 = 7 × 5/42 × 5 = 35/210
Subtract the two like fractions:
630/210 - 35/210 = 630 - 35/210 = 595/210
After reducing the fraction, the answer is 17/6
In mixed form: 25/6

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