Add 30/21 and 42/24
1st number: 1 9/21, 2nd number: 1 18/24
30/21 + 42/24 is 89/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 24 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 21 × 8 = 168,
30/21 = 30 × 8/21 × 8 = 240/168 - Likewise, for the 2nd fraction, since 24 × 7 = 168,
42/24 = 42 × 7/24 × 7 = 294/168 - Add the two like fractions:
240/168 + 294/168 = 240 + 294/168 = 534/168 - 534/168 simplified gives 89/28
- So, 30/21 + 42/24 = 89/28
In mixed form: 35/28
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