Answers

Add 9/30 and 9/40

9/30 + 9/40 is 21/40.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 30 and 40 is 120
   
   Next, find the equivalent fraction of both fractional numbers with denominator 120
2. For the 1st fraction, since 30 × 4 = 120,
   9/30 = 9 × 4/30 × 4 = 36/120
3. Likewise, for the 2nd fraction, since 40 × 3 = 120,
   9/40 = 9 × 3/40 × 3 = 27/120
4. Add the two like fractions:
   36/120 + 27/120 = 36 + 27/120 = 63/120
5. 63/120 simplified gives 21/40
6. So, 9/30 + 9/40 = 21/40

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