Add 15/90 and 45/42
1st number: 15/90, 2nd number: 1 3/42
15/90 + 45/42 is 26/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 42 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
15/90 = 15 × 7/90 × 7 = 105/630 - Likewise, for the 2nd fraction, since 42 × 15 = 630,
45/42 = 45 × 15/42 × 15 = 675/630 - Add the two like fractions:
105/630 + 675/630 = 105 + 675/630 = 780/630 - 780/630 simplified gives 26/21
- So, 15/90 + 45/42 = 26/21
In mixed form: 15/21
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