Add 36/80 and 90/21
1st number: 36/80, 2nd number: 4 6/21
36/80 + 90/21 is 663/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 21 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 80 × 21 = 1680,
36/80 = 36 × 21/80 × 21 = 756/1680 - Likewise, for the 2nd fraction, since 21 × 80 = 1680,
90/21 = 90 × 80/21 × 80 = 7200/1680 - Add the two like fractions:
756/1680 + 7200/1680 = 756 + 7200/1680 = 7956/1680 - 7956/1680 simplified gives 663/140
- So, 36/80 + 90/21 = 663/140
In mixed form: 4103/140
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