Add 45/18 and 90/72
1st number: 2 9/18, 2nd number: 1 18/72
45/18 + 90/72 is 15/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 72 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 18 × 4 = 72,
45/18 = 45 × 4/18 × 4 = 180/72 - Likewise, for the 2nd fraction, since 72 × 1 = 72,
90/72 = 90 × 1/72 × 1 = 90/72 - Add the two like fractions:
180/72 + 90/72 = 180 + 90/72 = 270/72 - 270/72 simplified gives 15/4
- So, 45/18 + 90/72 = 15/4
In mixed form: 33/4
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