Answers

Add 18/84 and 90/50

1^st number: 18/84, 2^nd number: 1 40/50

18/84 + 90/50 is 141/70.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 50 is 2100
   
   Next, find the equivalent fraction of both fractional numbers with denominator 2100
2. For the 1st fraction, since 84 × 25 = 2100,
   18/84 = 18 × 25/84 × 25 = 450/2100
3. Likewise, for the 2nd fraction, since 50 × 42 = 2100,
   90/50 = 90 × 42/50 × 42 = 3780/2100
4. Add the two like fractions:
   450/2100 + 3780/2100 = 450 + 3780/2100 = 4230/2100
5. 4230/2100 simplified gives 141/70
6. So, 18/84 + 90/50 = 141/70
   In mixed form: 21/70

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