Subtract 40/21 from 45/8
1st number: 5 5/8, 2nd number: 1 19/21
45/8 - 40/21 is 625/168.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 21 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 8 × 21 = 168,
45/8 = 45 × 21/8 × 21 = 945/168 - Likewise, for the 2nd fraction, since 21 × 8 = 168,
40/21 = 40 × 8/21 × 8 = 320/168 - Subtract the two like fractions:
945/168 - 320/168 = 945 - 320/168 = 625/168 - In mixed form: 3121/168
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