Answers

Add 21/90 and 63/60

1^st number: 21/90, 2^nd number: 1 3/60

21/90 + 63/60 is 77/60.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 90 and 60 is 180
   
   Next, find the equivalent fraction of both fractional numbers with denominator 180
2. For the 1st fraction, since 90 × 2 = 180,
   21/90 = 21 × 2/90 × 2 = 42/180
3. Likewise, for the 2nd fraction, since 60 × 3 = 180,
   63/60 = 63 × 3/60 × 3 = 189/180
4. Add the two like fractions:
   42/180 + 189/180 = 42 + 189/180 = 231/180
5. 231/180 simplified gives 77/60
6. So, 21/90 + 63/60 = 77/60
   In mixed form: 117/60

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