Subtract 21/7 from 98/20
1st number: 4 18/20, 2nd number: 3 0/7
98/20 - 21/7 is 19/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 7 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
98/20 = 98 × 7/20 × 7 = 686/140 - Likewise, for the 2nd fraction, since 7 × 20 = 140,
21/7 = 21 × 20/7 × 20 = 420/140 - Subtract the two like fractions:
686/140 - 420/140 = 686 - 420/140 = 266/140 - After reducing the fraction, the answer is 19/10
- In mixed form: 19/10
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