Subtract 42/35 from 21/8
1st number: 2 5/8, 2nd number: 1 7/35
21/8 - 42/35 is 57/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 35 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 8 × 35 = 280,
21/8 = 21 × 35/8 × 35 = 735/280 - Likewise, for the 2nd fraction, since 35 × 8 = 280,
42/35 = 42 × 8/35 × 8 = 336/280 - Subtract the two like fractions:
735/280 - 336/280 = 735 - 336/280 = 399/280 - After reducing the fraction, the answer is 57/40
- In mixed form: 117/40
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