Answers

Add 72/40 and 64/90

1^st number: 1 32/40, 2^nd number: 64/90

72/40 + 64/90 is 113/45.

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,
   64/90 = 64 × 4/90 × 4 = 256/360
4. Add the two like fractions:
   648/360 + 256/360 = 648 + 256/360 = 904/360
5. 904/360 simplified gives 113/45
6. So, 72/40 + 64/90 = 113/45
   In mixed form: 223/45

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