Answers

Add 42/72 and 45/25

1^st number: 42/72, 2^nd number: 1 20/25

42/72 + 45/25 is 143/60.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 72 and 25 is 1800
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1800
2. For the 1st fraction, since 72 × 25 = 1800,
   42/72 = 42 × 25/72 × 25 = 1050/1800
3. Likewise, for the 2nd fraction, since 25 × 72 = 1800,
   45/25 = 45 × 72/25 × 72 = 3240/1800
4. Add the two like fractions:
   1050/1800 + 3240/1800 = 1050 + 3240/1800 = 4290/1800
5. 4290/1800 simplified gives 143/60
6. So, 42/72 + 45/25 = 143/60
   In mixed form: 223/60

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