Answers

Add 25/28 and 90/72

1^st number: 25/28, 2^nd number: 1 18/72

25/28 + 90/72 is 15/7.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 28 and 72 is 504
   
   Next, find the equivalent fraction of both fractional numbers with denominator 504
2. For the 1st fraction, since 28 × 18 = 504,
   25/28 = 25 × 18/28 × 18 = 450/504
3. Likewise, for the 2nd fraction, since 72 × 7 = 504,
   90/72 = 90 × 7/72 × 7 = 630/504
4. Add the two like fractions:
   450/504 + 630/504 = 450 + 630/504 = 1080/504
5. 1080/504 simplified gives 15/7
6. So, 25/28 + 90/72 = 15/7
   In mixed form: 21/7

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