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Add 2/70 and 21/90

2/70 + 21/90 is 11/42.

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,
    2/70 = 2 × 9/70 × 9 = 18/630
  3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
    21/90 = 21 × 7/90 × 7 = 147/630
  4. Add the two fractions:
    18/630 + 147/630 = 18 + 147/630 = 165/630
  5. 165/630 simplified gives 11/42
  6. So, 2/70 + 21/90 = 11/42

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