Add 72/18 and 90/72
1st number: 4 0/18, 2nd number: 1 18/72
72/18 + 90/72 is 21/4.
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,
72/18 = 72 × 4/18 × 4 = 288/72 - Likewise, for the 2nd fraction, since 72 × 1 = 72,
90/72 = 90 × 1/72 × 1 = 90/72 - Add the two like fractions:
288/72 + 90/72 = 288 + 90/72 = 378/72 - 378/72 simplified gives 21/4
- So, 72/18 + 90/72 = 21/4
In mixed form: 51/4
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