Subtract 18/21 from 70/30
1st number: 2 10/30, 2nd number: 18/21
70/30 - 18/21 is 31/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 21 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 30 × 7 = 210,
70/30 = 70 × 7/30 × 7 = 490/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
18/21 = 18 × 10/21 × 10 = 180/210 - Subtract the two like fractions:
490/210 - 180/210 = 490 - 180/210 = 310/210 - After reducing the fraction, the answer is 31/21
- In mixed form: 110/21
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