Add 80/21 and 12/60
1st number: 3 17/21, 2nd number: 12/60
80/21 + 12/60 is 421/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 60 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 21 × 20 = 420,
80/21 = 80 × 20/21 × 20 = 1600/420 - Likewise, for the 2nd fraction, since 60 × 7 = 420,
12/60 = 12 × 7/60 × 7 = 84/420 - Add the two like fractions:
1600/420 + 84/420 = 1600 + 84/420 = 1684/420 - 1684/420 simplified gives 421/105
- So, 80/21 + 12/60 = 421/105
In mixed form: 41/105
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