Add 20/72 and 21/27
20/72 + 21/27 is 19/18.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 27 is 216
Next, find the equivalent fraction of both fractional numbers with denominator 216 - For the 1st fraction, since 72 × 3 = 216,
20/72 = 20 × 3/72 × 3 = 60/216 - Likewise, for the 2nd fraction, since 27 × 8 = 216,
21/27 = 21 × 8/27 × 8 = 168/216 - Add the two like fractions:
60/216 + 168/216 = 60 + 168/216 = 228/216 - 228/216 simplified gives 19/18
- So, 20/72 + 21/27 = 19/18
In mixed form: 11/18
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