Add 81/70 and 90/45
1st number: 1 11/70, 2nd number: 2 0/45
81/70 + 90/45 is 221/70.
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,
81/70 = 81 × 9/70 × 9 = 729/630 - Likewise, for the 2nd fraction, since 45 × 14 = 630,
90/45 = 90 × 14/45 × 14 = 1260/630 - Add the two like fractions:
729/630 + 1260/630 = 729 + 1260/630 = 1989/630 - 1989/630 simplified gives 221/70
- So, 81/70 + 90/45 = 221/70
In mixed form: 311/70
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