Add 20/72 and 21/54
20/72 + 21/54 is 2/3.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 54 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 54 × 4 = 216,
21/54 = 21 × 4/54 × 4 = 84/216 - Add the two like fractions:
60/216 + 84/216 = 60 + 84/216 = 144/216 - 144/216 simplified gives 2/3
- So, 20/72 + 21/54 = 2/3
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