Add 28/45 and 42/70
28/45 + 42/70 is 11/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 70 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 45 × 14 = 630,
28/45 = 28 × 14/45 × 14 = 392/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
42/70 = 42 × 9/70 × 9 = 378/630 - Add the two like fractions:
392/630 + 378/630 = 392 + 378/630 = 770/630 - 770/630 simplified gives 11/9
- So, 28/45 + 42/70 = 11/9
In mixed form: 12/9
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