Answers

Add 24/84 and 9/40

24/84 + 9/40 is 143/280.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 40 is 840
   
   Next, find the equivalent fraction of both fractional numbers with denominator 840
2. For the 1st fraction, since 84 × 10 = 840,
   24/84 = 24 × 10/84 × 10 = 240/840
3. Likewise, for the 2nd fraction, since 40 × 21 = 840,
   9/40 = 9 × 21/40 × 21 = 189/840
4. Add the two like fractions:
   240/840 + 189/840 = 240 + 189/840 = 429/840
5. 429/840 simplified gives 143/280
6. So, 24/84 + 9/40 = 143/280

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