Add 18/72 and 45/40
1st number: 18/72, 2nd number: 1 5/40
18/72 + 45/40 is 11/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 72 × 5 = 360,
18/72 = 18 × 5/72 × 5 = 90/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
45/40 = 45 × 9/40 × 9 = 405/360 - Add the two like fractions:
90/360 + 405/360 = 90 + 405/360 = 495/360 - 495/360 simplified gives 11/8
- So, 18/72 + 45/40 = 11/8
In mixed form: 13/8
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