Add 1/28 and 90/72
1st number: 1/28, 2nd number: 1 18/72
1/28 + 90/72 is 9/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 72 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 28 × 18 = 504,
1/28 = 1 × 18/28 × 18 = 18/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
90/72 = 90 × 7/72 × 7 = 630/504 - Add the two like fractions:
18/504 + 630/504 = 18 + 630/504 = 648/504 - 648/504 simplified gives 9/7
- So, 1/28 + 90/72 = 9/7
In mixed form: 12/7
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