Subtract 21/4 from 54/70
1st number: 54/70, 2nd number: 5 1/4
54/70 - 21/4 is -627/140.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 4 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 70 × 2 = 140,
54/70 = 54 × 2/70 × 2 = 108/140 - Likewise, for the 2nd fraction, since 4 × 35 = 140,
21/4 = 21 × 35/4 × 35 = 735/140 - Subtract the two like fractions:
108/140 - 735/140 = 108 - 735/140 = -627/140
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