Add 12/80 and 60/21
1st number: 12/80, 2nd number: 2 18/21
12/80 + 60/21 is 421/140.
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,
12/80 = 12 × 21/80 × 21 = 252/1680 - Likewise, for the 2nd fraction, since 21 × 80 = 1680,
60/21 = 60 × 80/21 × 80 = 4800/1680 - Add the two like fractions:
252/1680 + 4800/1680 = 252 + 4800/1680 = 5052/1680 - 5052/1680 simplified gives 421/140
- So, 12/80 + 60/21 = 421/140
In mixed form: 31/140
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