Answers

Add 90/20 and 72/40

1^st number: 4 10/20, 2^nd number: 1 32/40

90/20 + 72/40 is 63/10.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 40 is 40
   
   Next, find the equivalent fraction of both fractional numbers with denominator 40
2. For the 1st fraction, since 20 × 2 = 40,
   90/20 = 90 × 2/20 × 2 = 180/40
3. Likewise, for the 2nd fraction, since 40 × 1 = 40,
   72/40 = 72 × 1/40 × 1 = 72/40
4. Add the two like fractions:
   180/40 + 72/40 = 180 + 72/40 = 252/40
5. 252/40 simplified gives 63/10
6. So, 90/20 + 72/40 = 63/10
   In mixed form: 63/10

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