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Add 7/40 and 18/90

7/40 + 18/90 is 3/8.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 40 and 90 is 360
  2. For the 1st fraction, since 40 × 9 = 360,
    7/40 = 7 × 9/40 × 9 = 63/360
  3. Likewise, for the 2nd fraction, since 90 × 4 = 360,
    18/90 = 18 × 4/90 × 4 = 72/360
  4. Add the two fractions:
    63/360 + 72/360 = 63 + 72/360 = 135/360
  5. 135/360 simplified gives 3/8
  6. So, 7/40 + 18/90 = 3/8

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