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Add 1/7 and 21/90

1/7 + 21/90 is 79/210.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 7 and 90 is 630

    Next, find the equivalent fraction of both fractional numbers with denominator 630
  2. For the 1st fraction, since 7 × 90 = 630,
    1/7 = 1 × 90/7 × 90 = 90/630
  3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
    21/90 = 21 × 7/90 × 7 = 147/630
  4. Add the two like fractions:
    90/630 + 147/630 = 90 + 147/630 = 237/630
  5. 237/630 simplified gives 79/210
  6. So, 1/7 + 21/90 = 79/210

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