Add 81/72 and 10/42, Solve 1 9/72 + 10/42 as a fraction

Add 81/72 and 10/42

1^st number: 1 9/72, 2^nd number: 10/42

81/72 + 10/42 is 229/168.

Find the least common denominator or LCM of the two denominators:
LCM of 72 and 42 is 504

Next, find the equivalent fraction of both fractional numbers with denominator 504
For the 1st fraction, since 72 × 7 = 504,
81/72 = 81 × 7/72 × 7 = 567/504
Likewise, for the 2nd fraction, since 42 × 12 = 504,
10/42 = 10 × 12/42 × 12 = 120/504
Add the two like fractions:
567/504 + 120/504 = 567 + 120/504 = 687/504
687/504 simplified gives 229/168
So, 81/72 + 10/42 = 229/168
In mixed form: 161/168

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