Answers

Add 54/63 and 18/80

54/63 + 18/80 is 303/280.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 63 and 80 is 5040
   
   Next, find the equivalent fraction of both fractional numbers with denominator 5040
2. For the 1st fraction, since 63 × 80 = 5040,
   54/63 = 54 × 80/63 × 80 = 4320/5040
3. Likewise, for the 2nd fraction, since 80 × 63 = 5040,
   18/80 = 18 × 63/80 × 63 = 1134/5040
4. Add the two like fractions:
   4320/5040 + 1134/5040 = 4320 + 1134/5040 = 5454/5040
5. 5454/5040 simplified gives 303/280
6. So, 54/63 + 18/80 = 303/280
   In mixed form: 123/280

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