Answers

Add 90/45 and 72/40

1^st number: 2 0/45, 2^nd number: 1 32/40

90/45 + 72/40 is 19/5.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 45 and 40 is 360
   
   Next, find the equivalent fraction of both fractional numbers with denominator 360
2. For the 1st fraction, since 45 × 8 = 360,
   90/45 = 90 × 8/45 × 8 = 720/360
3. Likewise, for the 2nd fraction, since 40 × 9 = 360,
   72/40 = 72 × 9/40 × 9 = 648/360
4. Add the two like fractions:
   720/360 + 648/360 = 720 + 648/360 = 1368/360
5. 1368/360 simplified gives 19/5
6. So, 90/45 + 72/40 = 19/5
   In mixed form: 34/5

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