Answers

Add 40/84 and 21/54

40/84 + 21/54 is 109/126.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 54 is 756
   
   Next, find the equivalent fraction of both fractional numbers with denominator 756
2. For the 1st fraction, since 84 × 9 = 756,
   40/84 = 40 × 9/84 × 9 = 360/756
3. Likewise, for the 2nd fraction, since 54 × 14 = 756,
   21/54 = 21 × 14/54 × 14 = 294/756
4. Add the two like fractions:
   360/756 + 294/756 = 360 + 294/756 = 654/756
5. 654/756 simplified gives 109/126
6. So, 40/84 + 21/54 = 109/126

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