Add 63/42 and 21/90
1st number: 1 21/42, 2nd number: 21/90
63/42 + 21/90 is 26/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 42 × 15 = 630,
63/42 = 63 × 15/42 × 15 = 945/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
21/90 = 21 × 7/90 × 7 = 147/630 - Add the two like fractions:
945/630 + 147/630 = 945 + 147/630 = 1092/630 - 1092/630 simplified gives 26/15
- So, 63/42 + 21/90 = 26/15
In mixed form: 111/15
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