Add 63/21 and 81/90
1st number: 3 0/21, 2nd number: 81/90
63/21 + 81/90 is 39/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 21 × 30 = 630,
63/21 = 63 × 30/21 × 30 = 1890/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
81/90 = 81 × 7/90 × 7 = 567/630 - Add the two like fractions:
1890/630 + 567/630 = 1890 + 567/630 = 2457/630 - 2457/630 simplified gives 39/10
- So, 63/21 + 81/90 = 39/10
In mixed form: 39/10
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