Subtract 21/27 from 42/35, Solve 1 7/35

Subtract 21/27 from 42/35

1^st number: 1 7/35, 2^nd number: 21/27

42/35 - 21/27 is 19/45.

Find the least common denominator or LCM of the two denominators:
LCM of 35 and 27 is 945

Next, find the equivalent fraction of both fractional numbers with denominator 945
For the 1st fraction, since 35 × 27 = 945,
42/35 = 42 × 27/35 × 27 = 1134/945
Likewise, for the 2nd fraction, since 27 × 35 = 945,
21/27 = 21 × 35/27 × 35 = 735/945
Subtract the two like fractions:
1134/945 - 735/945 = 1134 - 735/945 = 399/945
After reducing the fraction, the answer is 19/45

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