Subtract 70/21 from 98/18
1st number: 5 8/18, 2nd number: 3 7/21
98/18 - 70/21 is 19/9.
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,
98/18 = 98 × 7/18 × 7 = 686/126 - Likewise, for the 2nd fraction, since 21 × 6 = 126,
70/21 = 70 × 6/21 × 6 = 420/126 - Subtract the two like fractions:
686/126 - 420/126 = 686 - 420/126 = 266/126 - After reducing the fraction, the answer is 19/9
- In mixed form: 21/9
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