Subtract 50/21 from 1/15, Solve 1/15

Subtract 50/21 from 1/15

1^st number: 1/15, 2^nd number: 2 8/21

1/15 - 50/21 is -81/35.

Find the least common denominator or LCM of the two denominators:
LCM of 15 and 21 is 105

Next, find the equivalent fraction of both fractional numbers with denominator 105
For the 1st fraction, since 15 × 7 = 105,
1/15 = 1 × 7/15 × 7 = 7/105
Likewise, for the 2nd fraction, since 21 × 5 = 105,
50/21 = 50 × 5/21 × 5 = 250/105
Subtract the two like fractions:
7/105 - 250/105 = 7 - 250/105 = -243/105
After reducing the fraction, the answer is -81/35

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