Answers

Add 40/84 and 2/80

40/84 + 2/80 is 421/840.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 80 is 1680
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1680
2. For the 1st fraction, since 84 × 20 = 1680,
   40/84 = 40 × 20/84 × 20 = 800/1680
3. Likewise, for the 2nd fraction, since 80 × 21 = 1680,
   2/80 = 2 × 21/80 × 21 = 42/1680
4. Add the two like fractions:
   800/1680 + 42/1680 = 800 + 42/1680 = 842/1680
5. 842/1680 simplified gives 421/840
6. So, 40/84 + 2/80 = 421/840

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