Add 30/21 and 40/8
1st number: 1 9/21, 2nd number: 5 0/8
30/21 + 40/8 is 45/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 8 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 8 × 21 = 168,
40/8 = 40 × 21/8 × 21 = 840/168 - Add the two like fractions:
240/168 + 840/168 = 240 + 840/168 = 1080/168 - 1080/168 simplified gives 45/7
- So, 30/21 + 40/8 = 45/7
In mixed form: 63/7
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