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Add 21/40 and 48/90

21/40 + 48/90 is 127/120.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 40 and 90 is 360

    Next, find the equivalent fraction of both fractional numbers with denominator 360
  2. For the 1st fraction, since 40 × 9 = 360,
    21/40 = 21 × 9/40 × 9 = 189/360
  3. Likewise, for the 2nd fraction, since 90 × 4 = 360,
    48/90 = 48 × 4/90 × 4 = 192/360
  4. Add the two like fractions:
    189/360 + 192/360 = 189 + 192/360 = 381/360
  5. 381/360 simplified gives 127/120
  6. So, 21/40 + 48/90 = 127/120
    In mixed form: 17/120

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