Subtract 20/21 from 63/8
1st number: 7 7/8, 2nd number: 20/21
63/8 - 20/21 is 1163/168.
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,
63/8 = 63 × 21/8 × 21 = 1323/168 - Likewise, for the 2nd fraction, since 21 × 8 = 168,
20/21 = 20 × 8/21 × 8 = 160/168 - Subtract the two like fractions:
1323/168 - 160/168 = 1323 - 160/168 = 1163/168 - In mixed form: 6155/168
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