Answers

Add 28/63 and 14/40

28/63 + 14/40 is 143/180.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 63 and 40 is 2520
   
   Next, find the equivalent fraction of both fractional numbers with denominator 2520
2. For the 1st fraction, since 63 × 40 = 2520,
   28/63 = 28 × 40/63 × 40 = 1120/2520
3. Likewise, for the 2nd fraction, since 40 × 63 = 2520,
   14/40 = 14 × 63/40 × 63 = 882/2520
4. Add the two like fractions:
   1120/2520 + 882/2520 = 1120 + 882/2520 = 2002/2520
5. 2002/2520 simplified gives 143/180
6. So, 28/63 + 14/40 = 143/180

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