Subtract 10/21 from 12/35, Solve 12/35

Subtract 10/21 from 12/35

12/35 - 10/21 is -2/15.

Find the least common denominator or LCM of the two denominators:
LCM of 35 and 21 is 105

Next, find the equivalent fraction of both fractional numbers with denominator 105
For the 1st fraction, since 35 × 3 = 105,
12/35 = 12 × 3/35 × 3 = 36/105
Likewise, for the 2nd fraction, since 21 × 5 = 105,
10/21 = 10 × 5/21 × 5 = 50/105
Subtract the two like fractions:
36/105 - 50/105 = 36 - 50/105 = -14/105
After reducing the fraction, the answer is -2/15

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