Add 9/42 and 81/60, Solve 9/42 + 1 21/60 as a fraction

Add 9/42 and 81/60

1^st number: 9/42, 2^nd number: 1 21/60

9/42 + 81/60 is 219/140.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 60 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 42 × 10 = 420,
9/42 = 9 × 10/42 × 10 = 90/420
Likewise, for the 2nd fraction, since 60 × 7 = 420,
81/60 = 81 × 7/60 × 7 = 567/420
Add the two like fractions:
90/420 + 567/420 = 90 + 567/420 = 657/420
657/420 simplified gives 219/140
So, 9/42 + 81/60 = 219/140
In mixed form: 179/140

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