Solutions by everydaycalculation.com

## Subtract 1/8 from 21/15

1st number: 1 6/15, 2nd number: 1/8

21/15 - 1/8 is 51/40.

#### Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
LCM of 15 and 8 is 120
2. For the 1st fraction, since 15 × 8 = 120,
21/15 = 21 × 8/15 × 8 = 168/120
3. Likewise, for the 2nd fraction, since 8 × 15 = 120,
1/8 = 1 × 15/8 × 15 = 15/120
4. Subtract the two fractions:
168/120 - 15/120 = 168 - 15/120 = 153/120
5. After reducing the fraction, the answer is 51/40
6. In mixed form: 111/40

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