Answers

Add 21/64 and 54/70

21/64 + 54/70 is 2463/2240.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 64 and 70 is 2240
   
   Next, find the equivalent fraction of both fractional numbers with denominator 2240
2. For the 1st fraction, since 64 × 35 = 2240,
   21/64 = 21 × 35/64 × 35 = 735/2240
3. Likewise, for the 2nd fraction, since 70 × 32 = 2240,
   54/70 = 54 × 32/70 × 32 = 1728/2240
4. Add the two like fractions:
   735/2240 + 1728/2240 = 735 + 1728/2240 = 2463/2240
5. So, 21/64 + 54/70 = 2463/2240
   In mixed form: 1223/2240

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