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Add 24/70 and 42/90

24/70 + 42/90 is 17/21.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 70 and 90 is 630
  2. For the 1st fraction, since 70 × 9 = 630,
    24/70 = 24 × 9/70 × 9 = 216/630
  3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
    42/90 = 42 × 7/90 × 7 = 294/630
  4. Add the two fractions:
    216/630 + 294/630 = 216 + 294/630 = 510/630
  5. 510/630 simplified gives 17/21
  6. So, 24/70 + 42/90 = 17/21

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