Add 1/42 and 90/70, Solve 1/42 + 1 20/70 as a fraction

Add 1/42 and 90/70

1^st number: 1/42, 2^nd number: 1 20/70

1/42 + 90/70 is 55/42.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 70 is 210

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 42 × 5 = 210,
1/42 = 1 × 5/42 × 5 = 5/210
Likewise, for the 2nd fraction, since 70 × 3 = 210,
90/70 = 90 × 3/70 × 3 = 270/210
Add the two like fractions:
5/210 + 270/210 = 5 + 270/210 = 275/210
275/210 simplified gives 55/42
So, 1/42 + 90/70 = 55/42
In mixed form: 113/42

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