Answers

Add 18/63 and 42/60

18/63 + 42/60 is 69/70.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 63 and 60 is 1260
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1260
2. For the 1st fraction, since 63 × 20 = 1260,
   18/63 = 18 × 20/63 × 20 = 360/1260
3. Likewise, for the 2nd fraction, since 60 × 21 = 1260,
   42/60 = 42 × 21/60 × 21 = 882/1260
4. Add the two like fractions:
   360/1260 + 882/1260 = 360 + 882/1260 = 1242/1260
5. 1242/1260 simplified gives 69/70
6. So, 18/63 + 42/60 = 69/70

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