Add 28/30 and 21/45
28/30 + 21/45 is 7/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 45 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 30 × 3 = 90,
28/30 = 28 × 3/30 × 3 = 84/90 - Likewise, for the 2nd fraction, since 45 × 2 = 90,
21/45 = 21 × 2/45 × 2 = 42/90 - Add the two like fractions:
84/90 + 42/90 = 84 + 42/90 = 126/90 - 126/90 simplified gives 7/5
- So, 28/30 + 21/45 = 7/5
In mixed form: 12/5
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