Subtract 21/8 from 72/10
1st number: 7 2/10, 2nd number: 2 5/8
72/10 - 21/8 is 183/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 8 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 10 × 4 = 40,
72/10 = 72 × 4/10 × 4 = 288/40 - Likewise, for the 2nd fraction, since 8 × 5 = 40,
21/8 = 21 × 5/8 × 5 = 105/40 - Subtract the two like fractions:
288/40 - 105/40 = 288 - 105/40 = 183/40 - In mixed form: 423/40
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