Answers

Add 40/21 and 54/40

1^st number: 1 19/21, 2^nd number: 1 14/40

40/21 + 54/40 is 1367/420.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 40 is 840
   
   Next, find the equivalent fraction of both fractional numbers with denominator 840
2. For the 1st fraction, since 21 × 40 = 840,
   40/21 = 40 × 40/21 × 40 = 1600/840
3. Likewise, for the 2nd fraction, since 40 × 21 = 840,
   54/40 = 54 × 21/40 × 21 = 1134/840
4. Add the two like fractions:
   1600/840 + 1134/840 = 1600 + 1134/840 = 2734/840
5. 2734/840 simplified gives 1367/420
6. So, 40/21 + 54/40 = 1367/420
   In mixed form: 3107/420

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