Add 81/90 and 98/21
1st number: 81/90, 2nd number: 4 14/21
81/90 + 98/21 is 167/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 21 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
81/90 = 81 × 7/90 × 7 = 567/630 - Likewise, for the 2nd fraction, since 21 × 30 = 630,
98/21 = 98 × 30/21 × 30 = 2940/630 - Add the two like fractions:
567/630 + 2940/630 = 567 + 2940/630 = 3507/630 - 3507/630 simplified gives 167/30
- So, 81/90 + 98/21 = 167/30
In mixed form: 517/30
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