Add 81/60 and 48/70, Solve 1 21/60 + 48/70 as a fraction

Add 81/60 and 48/70

1^st number: 1 21/60, 2^nd number: 48/70

81/60 + 48/70 is 57/28.

Find the least common denominator or LCM of the two denominators:
LCM of 60 and 70 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 60 × 7 = 420,
81/60 = 81 × 7/60 × 7 = 567/420
Likewise, for the 2nd fraction, since 70 × 6 = 420,
48/70 = 48 × 6/70 × 6 = 288/420
Add the two like fractions:
567/420 + 288/420 = 567 + 288/420 = 855/420
855/420 simplified gives 57/28
So, 81/60 + 48/70 = 57/28
In mixed form: 21/28

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