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Add 20/35 and 21/90

20/35 + 21/90 is 169/210.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 35 and 90 is 630

    Next, find the equivalent fraction of both fractional numbers with denominator 630
  2. For the 1st fraction, since 35 × 18 = 630,
    20/35 = 20 × 18/35 × 18 = 360/630
  3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
    21/90 = 21 × 7/90 × 7 = 147/630
  4. Add the two like fractions:
    360/630 + 147/630 = 360 + 147/630 = 507/630
  5. 507/630 simplified gives 169/210
  6. So, 20/35 + 21/90 = 169/210

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