Subtract 21/27 from 15/8
1st number: 1 7/8, 2nd number: 21/27
15/8 - 21/27 is 79/72.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 27 is 216
Next, find the equivalent fraction of both fractional numbers with denominator 216 - For the 1st fraction, since 8 × 27 = 216,
15/8 = 15 × 27/8 × 27 = 405/216 - Likewise, for the 2nd fraction, since 27 × 8 = 216,
21/27 = 21 × 8/27 × 8 = 168/216 - Subtract the two like fractions:
405/216 - 168/216 = 405 - 168/216 = 237/216 - After reducing the fraction, the answer is 79/72
- In mixed form: 17/72
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