Answers

Add 54/42 and 7/40

1^st number: 1 12/42, 2^nd number: 7/40

54/42 + 7/40 is 409/280.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 40 is 840
   
   Next, find the equivalent fraction of both fractional numbers with denominator 840
2. For the 1st fraction, since 42 × 20 = 840,
   54/42 = 54 × 20/42 × 20 = 1080/840
3. Likewise, for the 2nd fraction, since 40 × 21 = 840,
   7/40 = 7 × 21/40 × 21 = 147/840
4. Add the two like fractions:
   1080/840 + 147/840 = 1080 + 147/840 = 1227/840
5. 1227/840 simplified gives 409/280
6. So, 54/42 + 7/40 = 409/280
   In mixed form: 1129/280

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