Add 28/63 and 70/90
28/63 + 70/90 is 11/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 63 × 10 = 630,
28/63 = 28 × 10/63 × 10 = 280/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
70/90 = 70 × 7/90 × 7 = 490/630 - Add the two like fractions:
280/630 + 490/630 = 280 + 490/630 = 770/630 - 770/630 simplified gives 11/9
- So, 28/63 + 70/90 = 11/9
In mixed form: 12/9
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