Add 90/21 and 80/5
1st number: 4 6/21, 2nd number: 16 0/5
90/21 + 80/5 is 142/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 5 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 21 × 5 = 105,
90/21 = 90 × 5/21 × 5 = 450/105 - Likewise, for the 2nd fraction, since 5 × 21 = 105,
80/5 = 80 × 21/5 × 21 = 1680/105 - Add the two like fractions:
450/105 + 1680/105 = 450 + 1680/105 = 2130/105 - 2130/105 simplified gives 142/7
- So, 90/21 + 80/5 = 142/7
In mixed form: 202/7
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