Answers

Add 28/72 and 21/60

28/72 + 21/60 is 133/180.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 72 and 60 is 360
   
   Next, find the equivalent fraction of both fractional numbers with denominator 360
2. For the 1st fraction, since 72 × 5 = 360,
   28/72 = 28 × 5/72 × 5 = 140/360
3. Likewise, for the 2nd fraction, since 60 × 6 = 360,
   21/60 = 21 × 6/60 × 6 = 126/360
4. Add the two like fractions:
   140/360 + 126/360 = 140 + 126/360 = 266/360
5. 266/360 simplified gives 133/180
6. So, 28/72 + 21/60 = 133/180

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