Subtract 21/20 from 54/7
1st number: 7 5/7, 2nd number: 1 1/20
54/7 - 21/20 is 933/140.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 7 × 20 = 140,
54/7 = 54 × 20/7 × 20 = 1080/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
21/20 = 21 × 7/20 × 7 = 147/140 - Subtract the two like fractions:
1080/140 - 147/140 = 1080 - 147/140 = 933/140 - In mixed form: 693/140
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