Answers

Add 21/75 and 54/63

21/75 + 54/63 is 199/175.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 75 and 63 is 1575
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1575
2. For the 1st fraction, since 75 × 21 = 1575,
   21/75 = 21 × 21/75 × 21 = 441/1575
3. Likewise, for the 2nd fraction, since 63 × 25 = 1575,
   54/63 = 54 × 25/63 × 25 = 1350/1575
4. Add the two like fractions:
   441/1575 + 1350/1575 = 441 + 1350/1575 = 1791/1575
5. 1791/1575 simplified gives 199/175
6. So, 21/75 + 54/63 = 199/175
   In mixed form: 124/175

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