Add 9/70 and 42/81
9/70 + 42/81 is 1223/1890.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 81 is 5670
Next, find the equivalent fraction of both fractional numbers with denominator 5670 - For the 1st fraction, since 70 × 81 = 5670,
9/70 = 9 × 81/70 × 81 = 729/5670 - Likewise, for the 2nd fraction, since 81 × 70 = 5670,
42/81 = 42 × 70/81 × 70 = 2940/5670 - Add the two like fractions:
729/5670 + 2940/5670 = 729 + 2940/5670 = 3669/5670 - 3669/5670 simplified gives 1223/1890
- So, 9/70 + 42/81 = 1223/1890
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