Add 28/30 and 54/21
1st number: 28/30, 2nd number: 2 12/21
28/30 + 54/21 is 368/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 21 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 30 × 7 = 210,
28/30 = 28 × 7/30 × 7 = 196/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
54/21 = 54 × 10/21 × 10 = 540/210 - Add the two like fractions:
196/210 + 540/210 = 196 + 540/210 = 736/210 - 736/210 simplified gives 368/105
- So, 28/30 + 54/21 = 368/105
In mixed form: 353/105
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