Subtract 15/25 from 21/8
1st number: 2 5/8, 2nd number: 15/25
21/8 - 15/25 is 81/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 25 is 200
Next, find the equivalent fraction of both fractional numbers with denominator 200 - For the 1st fraction, since 8 × 25 = 200,
21/8 = 21 × 25/8 × 25 = 525/200 - Likewise, for the 2nd fraction, since 25 × 8 = 200,
15/25 = 15 × 8/25 × 8 = 120/200 - Subtract the two like fractions:
525/200 - 120/200 = 525 - 120/200 = 405/200 - After reducing the fraction, the answer is 81/40
- In mixed form: 21/40
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