Answers

Add 90/84 and 54/40

1^st number: 1 6/84, 2^nd number: 1 14/40

90/84 + 54/40 is 339/140.

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,
   90/84 = 90 × 10/84 × 10 = 900/840
3. Likewise, for the 2nd fraction, since 40 × 21 = 840,
   54/40 = 54 × 21/40 × 21 = 1134/840
4. Add the two like fractions:
   900/840 + 1134/840 = 900 + 1134/840 = 2034/840
5. 2034/840 simplified gives 339/140
6. So, 90/84 + 54/40 = 339/140
   In mixed form: 259/140

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