Subtract 12/40 from 42/35, Solve 1 7/35

Subtract 12/40 from 42/35

1^st number: 1 7/35, 2^nd number: 12/40

42/35 - 12/40 is 9/10.

Find the least common denominator or LCM of the two denominators:
LCM of 35 and 40 is 280

Next, find the equivalent fraction of both fractional numbers with denominator 280
For the 1st fraction, since 35 × 8 = 280,
42/35 = 42 × 8/35 × 8 = 336/280
Likewise, for the 2nd fraction, since 40 × 7 = 280,
12/40 = 12 × 7/40 × 7 = 84/280
Subtract the two like fractions:
336/280 - 84/280 = 336 - 84/280 = 252/280
After reducing the fraction, the answer is 9/10

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