Subtract 12/21 from 70/18
1st number: 3 16/18, 2nd number: 12/21
70/18 - 12/21 is 209/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 21 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 18 × 7 = 126,
70/18 = 70 × 7/18 × 7 = 490/126 - Likewise, for the 2nd fraction, since 21 × 6 = 126,
12/21 = 12 × 6/21 × 6 = 72/126 - Subtract the two like fractions:
490/126 - 72/126 = 490 - 72/126 = 418/126 - After reducing the fraction, the answer is 209/63
- In mixed form: 320/63
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