Add 18/72 and 40/20
1st number: 18/72, 2nd number: 2 0/20
18/72 + 40/20 is 9/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 20 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 20 × 18 = 360,
40/20 = 40 × 18/20 × 18 = 720/360 - Add the two like fractions:
90/360 + 720/360 = 90 + 720/360 = 810/360 - 810/360 simplified gives 9/4
- So, 18/72 + 40/20 = 9/4
In mixed form: 21/4
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