Add 81/90 and 84/7
1st number: 81/90, 2nd number: 12 0/7
81/90 + 84/7 is 129/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 7 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 7 × 90 = 630,
84/7 = 84 × 90/7 × 90 = 7560/630 - Add the two like fractions:
567/630 + 7560/630 = 567 + 7560/630 = 8127/630 - 8127/630 simplified gives 129/10
- So, 81/90 + 84/7 = 129/10
In mixed form: 129/10
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