Add 21/90 and 63/14
1st number: 21/90, 2nd number: 4 7/14
21/90 + 63/14 is 71/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 14 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
21/90 = 21 × 7/90 × 7 = 147/630 - Likewise, for the 2nd fraction, since 14 × 45 = 630,
63/14 = 63 × 45/14 × 45 = 2835/630 - Add the two like fractions:
147/630 + 2835/630 = 147 + 2835/630 = 2982/630 - 2982/630 simplified gives 71/15
- So, 21/90 + 63/14 = 71/15
In mixed form: 411/15
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