Answers

Add 21/60 and 2/90

21/60 + 2/90 is 67/180.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 60 and 90 is 180
   
   Next, find the equivalent fraction of both fractional numbers with denominator 180
2. For the 1st fraction, since 60 × 3 = 180,
   21/60 = 21 × 3/60 × 3 = 63/180
3. Likewise, for the 2nd fraction, since 90 × 2 = 180,
   2/90 = 2 × 2/90 × 2 = 4/180
4. Add the two like fractions:
   63/180 + 4/180 = 63 + 4/180 = 67/180
5. So, 21/60 + 2/90 = 67/180

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