Add 15/70 and 90/45
1st number: 15/70, 2nd number: 2 0/45
15/70 + 90/45 is 31/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 45 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 70 × 9 = 630,
15/70 = 15 × 9/70 × 9 = 135/630 - Likewise, for the 2nd fraction, since 45 × 14 = 630,
90/45 = 90 × 14/45 × 14 = 1260/630 - Add the two like fractions:
135/630 + 1260/630 = 135 + 1260/630 = 1395/630 - 1395/630 simplified gives 31/14
- So, 15/70 + 90/45 = 31/14
In mixed form: 23/14
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