Answers

Add 70/25 and 72/90

1^st number: 2 20/25, 2^nd number: 72/90

70/25 + 72/90 is 18/5.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 25 and 90 is 450
   
   Next, find the equivalent fraction of both fractional numbers with denominator 450
2. For the 1st fraction, since 25 × 18 = 450,
   70/25 = 70 × 18/25 × 18 = 1260/450
3. Likewise, for the 2nd fraction, since 90 × 5 = 450,
   72/90 = 72 × 5/90 × 5 = 360/450
4. Add the two like fractions:
   1260/450 + 360/450 = 1260 + 360/450 = 1620/450
5. 1620/450 simplified gives 18/5
6. So, 70/25 + 72/90 = 18/5
   In mixed form: 33/5

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