Add 40/18 and 81/70, Solve 2 4/18 + 1 11/70 as a fraction

Add 40/18 and 81/70

1^st number: 2 4/18, 2^nd number: 1 11/70

40/18 + 81/70 is 2129/630.

Find the least common denominator or LCM of the two denominators:
LCM of 18 and 70 is 630

Next, find the equivalent fraction of both fractional numbers with denominator 630
For the 1st fraction, since 18 × 35 = 630,
40/18 = 40 × 35/18 × 35 = 1400/630
Likewise, for the 2nd fraction, since 70 × 9 = 630,
81/70 = 81 × 9/70 × 9 = 729/630
Add the two like fractions:
1400/630 + 729/630 = 1400 + 729/630 = 2129/630
So, 40/18 + 81/70 = 2129/630
In mixed form: 3239/630

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