Add 20/12 and 25/70, Solve 1 8/12 + 25/70 as a fraction

Add 20/12 and 25/70

1^st number: 1 8/12, 2^nd number: 25/70

20/12 + 25/70 is 85/42.

Find the least common denominator or LCM of the two denominators:
LCM of 12 and 70 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 12 × 35 = 420,
20/12 = 20 × 35/12 × 35 = 700/420
Likewise, for the 2nd fraction, since 70 × 6 = 420,
25/70 = 25 × 6/70 × 6 = 150/420
Add the two like fractions:
700/420 + 150/420 = 700 + 150/420 = 850/420
850/420 simplified gives 85/42
So, 20/12 + 25/70 = 85/42
In mixed form: 21/42

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