Answers

Add 90/84 and 42/60

1^st number: 1 6/84, 2^nd number: 42/60

90/84 + 42/60 is 62/35.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 60 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 84 × 5 = 420,
   90/84 = 90 × 5/84 × 5 = 450/420
3. Likewise, for the 2nd fraction, since 60 × 7 = 420,
   42/60 = 42 × 7/60 × 7 = 294/420
4. Add the two like fractions:
   450/420 + 294/420 = 450 + 294/420 = 744/420
5. 744/420 simplified gives 62/35
6. So, 90/84 + 42/60 = 62/35
   In mixed form: 127/35

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