Add 80/18 and 1/21, Solve 4 8/18 + 1/21 as a fraction

Add 80/18 and 1/21

1^st number: 4 8/18, 2^nd number: 1/21

80/18 + 1/21 is 283/63.

Find the least common denominator or LCM of the two denominators:
LCM of 18 and 21 is 126

Next, find the equivalent fraction of both fractional numbers with denominator 126
For the 1st fraction, since 18 × 7 = 126,
80/18 = 80 × 7/18 × 7 = 560/126
Likewise, for the 2nd fraction, since 21 × 6 = 126,
1/21 = 1 × 6/21 × 6 = 6/126
Add the two like fractions:
560/126 + 6/126 = 560 + 6/126 = 566/126
566/126 simplified gives 283/63
So, 80/18 + 1/21 = 283/63
In mixed form: 431/63

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