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Add 18/90 and 18/70

18/90 + 18/70 is 16/35.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 90 and 70 is 630
  2. For the 1st fraction, since 90 × 7 = 630,
    18/90 = 18 × 7/90 × 7 = 126/630
  3. Likewise, for the 2nd fraction, since 70 × 9 = 630,
    18/70 = 18 × 9/70 × 9 = 162/630
  4. Add the two fractions:
    126/630 + 162/630 = 126 + 162/630 = 288/630
  5. 288/630 simplified gives 16/35
  6. So, 18/90 + 18/70 = 16/35

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