Subtract 21/40 from 84/35
1st number: 2 14/35, 2nd number: 21/40
84/35 - 21/40 is 15/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 40 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 35 × 8 = 280,
84/35 = 84 × 8/35 × 8 = 672/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
21/40 = 21 × 7/40 × 7 = 147/280 - Subtract the two like fractions:
672/280 - 147/280 = 672 - 147/280 = 525/280 - After reducing the fraction, the answer is 15/8
- In mixed form: 17/8
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