Answers

Add 90/72 and 40/64

1^st number: 1 18/72, 2^nd number: 40/64

90/72 + 40/64 is 15/8.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 72 and 64 is 576
   
   Next, find the equivalent fraction of both fractional numbers with denominator 576
2. For the 1st fraction, since 72 × 8 = 576,
   90/72 = 90 × 8/72 × 8 = 720/576
3. Likewise, for the 2nd fraction, since 64 × 9 = 576,
   40/64 = 40 × 9/64 × 9 = 360/576
4. Add the two like fractions:
   720/576 + 360/576 = 720 + 360/576 = 1080/576
5. 1080/576 simplified gives 15/8
6. So, 90/72 + 40/64 = 15/8
   In mixed form: 17/8

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