Answers

Add 21/40 and 54/30

1^st number: 21/40, 2^nd number: 1 24/30

21/40 + 54/30 is 93/40.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 40 and 30 is 120
   
   Next, find the equivalent fraction of both fractional numbers with denominator 120
2. For the 1st fraction, since 40 × 3 = 120,
   21/40 = 21 × 3/40 × 3 = 63/120
3. Likewise, for the 2nd fraction, since 30 × 4 = 120,
   54/30 = 54 × 4/30 × 4 = 216/120
4. Add the two like fractions:
   63/120 + 216/120 = 63 + 216/120 = 279/120
5. 279/120 simplified gives 93/40
6. So, 21/40 + 54/30 = 93/40
   In mixed form: 213/40

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