Add 18/60 and 80/21
1st number: 18/60, 2nd number: 3 17/21
18/60 + 80/21 is 863/210.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 21 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 60 × 7 = 420,
18/60 = 18 × 7/60 × 7 = 126/420 - Likewise, for the 2nd fraction, since 21 × 20 = 420,
80/21 = 80 × 20/21 × 20 = 1600/420 - Add the two like fractions:
126/420 + 1600/420 = 126 + 1600/420 = 1726/420 - 1726/420 simplified gives 863/210
- So, 18/60 + 80/21 = 863/210
In mixed form: 423/210
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