Answers

Add 72/40 and 30/90

1^st number: 1 32/40, 2^nd number: 30/90

72/40 + 30/90 is 32/15.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 40 and 90 is 360
   
   Next, find the equivalent fraction of both fractional numbers with denominator 360
2. For the 1st fraction, since 40 × 9 = 360,
   72/40 = 72 × 9/40 × 9 = 648/360
3. Likewise, for the 2nd fraction, since 90 × 4 = 360,
   30/90 = 30 × 4/90 × 4 = 120/360
4. Add the two like fractions:
   648/360 + 120/360 = 648 + 120/360 = 768/360
5. 768/360 simplified gives 32/15
6. So, 72/40 + 30/90 = 32/15
   In mixed form: 22/15

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