Add 80/21 and 8/40
1st number: 3 17/21, 2nd number: 8/40
80/21 + 8/40 is 421/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 40 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 21 × 40 = 840,
80/21 = 80 × 40/21 × 40 = 3200/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
8/40 = 8 × 21/40 × 21 = 168/840 - Add the two like fractions:
3200/840 + 168/840 = 3200 + 168/840 = 3368/840 - 3368/840 simplified gives 421/105
- So, 80/21 + 8/40 = 421/105
In mixed form: 41/105
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