Answers

Add 80/70 and 21/64

1^st number: 1 10/70, 2^nd number: 21/64

80/70 + 21/64 is 659/448.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 70 and 64 is 2240
   
   Next, find the equivalent fraction of both fractional numbers with denominator 2240
2. For the 1st fraction, since 70 × 32 = 2240,
   80/70 = 80 × 32/70 × 32 = 2560/2240
3. Likewise, for the 2nd fraction, since 64 × 35 = 2240,
   21/64 = 21 × 35/64 × 35 = 735/2240
4. Add the two like fractions:
   2560/2240 + 735/2240 = 2560 + 735/2240 = 3295/2240
5. 3295/2240 simplified gives 659/448
6. So, 80/70 + 21/64 = 659/448
   In mixed form: 1211/448

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