Add 18/60 and 3/21
18/60 + 3/21 is 31/70.
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,
3/21 = 3 × 20/21 × 20 = 60/420 - Add the two like fractions:
126/420 + 60/420 = 126 + 60/420 = 186/420 - 186/420 simplified gives 31/70
- So, 18/60 + 3/21 = 31/70
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