Add 98/20 and 81/28
1st number: 4 18/20, 2nd number: 2 25/28
98/20 + 81/28 is 1091/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 28 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 28 × 5 = 140,
81/28 = 81 × 5/28 × 5 = 405/140 - Add the two like fractions:
686/140 + 405/140 = 686 + 405/140 = 1091/140 - So, 98/20 + 81/28 = 1091/140
In mixed form: 7111/140
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