Subtract 21/49 from 42/35, Solve 1 7/35

Subtract 21/49 from 42/35

1^st number: 1 7/35, 2^nd number: 21/49

42/35 - 21/49 is 27/35.

Find the least common denominator or LCM of the two denominators:
LCM of 35 and 49 is 245

Next, find the equivalent fraction of both fractional numbers with denominator 245
For the 1st fraction, since 35 × 7 = 245,
42/35 = 42 × 7/35 × 7 = 294/245
Likewise, for the 2nd fraction, since 49 × 5 = 245,
21/49 = 21 × 5/49 × 5 = 105/245
Subtract the two like fractions:
294/245 - 105/245 = 294 - 105/245 = 189/245
After reducing the fraction, the answer is 27/35

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