Add 40/72 and 81/70, Solve 40/72 + 1 11/70 as a fraction

Add 40/72 and 81/70

1^st number: 40/72, 2^nd number: 1 11/70

40/72 + 81/70 is 1079/630.

Find the least common denominator or LCM of the two denominators:
LCM of 72 and 70 is 2520

Next, find the equivalent fraction of both fractional numbers with denominator 2520
For the 1st fraction, since 72 × 35 = 2520,
40/72 = 40 × 35/72 × 35 = 1400/2520
Likewise, for the 2nd fraction, since 70 × 36 = 2520,
81/70 = 81 × 36/70 × 36 = 2916/2520
Add the two like fractions:
1400/2520 + 2916/2520 = 1400 + 2916/2520 = 4316/2520
4316/2520 simplified gives 1079/630
So, 40/72 + 81/70 = 1079/630
In mixed form: 1449/630

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