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Add 10/60 and 21/90

10/60 + 21/90 is 2/5.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 60 and 90 is 180
  2. For the 1st fraction, since 60 × 3 = 180,
    10/60 = 10 × 3/60 × 3 = 30/180
  3. Likewise, for the 2nd fraction, since 90 × 2 = 180,
    21/90 = 21 × 2/90 × 2 = 42/180
  4. Add the two fractions:
    30/180 + 42/180 = 30 + 42/180 = 72/180
  5. 72/180 simplified gives 2/5
  6. So, 10/60 + 21/90 = 2/5

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