Add 25/70 and 42/81
25/70 + 42/81 is 331/378.
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,
25/70 = 25 × 81/70 × 81 = 2025/5670 - Likewise, for the 2nd fraction, since 81 × 70 = 5670,
42/81 = 42 × 70/81 × 70 = 2940/5670 - Add the two like fractions:
2025/5670 + 2940/5670 = 2025 + 2940/5670 = 4965/5670 - 4965/5670 simplified gives 331/378
- So, 25/70 + 42/81 = 331/378
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