Add 20/42 and 63/72
20/42 + 63/72 is 227/168.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 72 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 42 × 12 = 504,
20/42 = 20 × 12/42 × 12 = 240/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
63/72 = 63 × 7/72 × 7 = 441/504 - Add the two like fractions:
240/504 + 441/504 = 240 + 441/504 = 681/504 - 681/504 simplified gives 227/168
- So, 20/42 + 63/72 = 227/168
In mixed form: 159/168
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