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Add 2/21 and 4/90

2/21 + 4/90 is 44/315.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 90 is 630
  2. For the 1st fraction, since 21 × 30 = 630,
    2/21 = 2 × 30/21 × 30 = 60/630
  3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
    4/90 = 4 × 7/90 × 7 = 28/630
  4. Add the two fractions:
    60/630 + 28/630 = 60 + 28/630 = 88/630
  5. 88/630 simplified gives 44/315
  6. So, 2/21 + 4/90 = 44/315

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