Add 75/70 and 21/9
1st number: 1 5/70, 2nd number: 2 3/9
75/70 + 21/9 is 143/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 9 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 70 × 9 = 630,
75/70 = 75 × 9/70 × 9 = 675/630 - Likewise, for the 2nd fraction, since 9 × 70 = 630,
21/9 = 21 × 70/9 × 70 = 1470/630 - Add the two like fractions:
675/630 + 1470/630 = 675 + 1470/630 = 2145/630 - 2145/630 simplified gives 143/42
- So, 75/70 + 21/9 = 143/42
In mixed form: 317/42
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