Subtract 30/21 from 70/28
1st number: 2 14/28, 2nd number: 1 9/21
70/28 - 30/21 is 15/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 28 × 3 = 84,
70/28 = 70 × 3/28 × 3 = 210/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
30/21 = 30 × 4/21 × 4 = 120/84 - Subtract the two like fractions:
210/84 - 120/84 = 210 - 120/84 = 90/84 - After reducing the fraction, the answer is 15/14
- In mixed form: 11/14
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