Subtract 81/70 from 21/5
1st number: 4 1/5, 2nd number: 1 11/70
21/5 - 81/70 is 213/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 70 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 5 × 14 = 70,
21/5 = 21 × 14/5 × 14 = 294/70 - Likewise, for the 2nd fraction, since 70 × 1 = 70,
81/70 = 81 × 1/70 × 1 = 81/70 - Subtract the two like fractions:
294/70 - 81/70 = 294 - 81/70 = 213/70 - In mixed form: 33/70
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