Subtract 15/70 from 21/4
1st number: 5 1/4, 2nd number: 15/70
21/4 - 15/70 is 141/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 70 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 4 × 35 = 140,
21/4 = 21 × 35/4 × 35 = 735/140 - Likewise, for the 2nd fraction, since 70 × 2 = 140,
15/70 = 15 × 2/70 × 2 = 30/140 - Subtract the two like fractions:
735/140 - 30/140 = 735 - 30/140 = 705/140 - After reducing the fraction, the answer is 141/28
- In mixed form: 51/28
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