Add 3/90 and 81/70
1st number: 3/90, 2nd number: 1 11/70
3/90 + 81/70 is 25/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 70 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
3/90 = 3 × 7/90 × 7 = 21/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
81/70 = 81 × 9/70 × 9 = 729/630 - Add the two like fractions:
21/630 + 729/630 = 21 + 729/630 = 750/630 - 750/630 simplified gives 25/21
- So, 3/90 + 81/70 = 25/21
In mixed form: 14/21
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