Add 90/80 and 30/21
1st number: 1 10/80, 2nd number: 1 9/21
90/80 + 30/21 is 143/56.
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,
90/80 = 90 × 21/80 × 21 = 1890/1680 - Likewise, for the 2nd fraction, since 21 × 80 = 1680,
30/21 = 30 × 80/21 × 80 = 2400/1680 - Add the two like fractions:
1890/1680 + 2400/1680 = 1890 + 2400/1680 = 4290/1680 - 4290/1680 simplified gives 143/56
- So, 90/80 + 30/21 = 143/56
In mixed form: 231/56
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