Answers

Add 70/64 and 4/90

1^st number: 1 6/64, 2^nd number: 4/90

70/64 + 4/90 is 1639/1440.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 64 and 90 is 2880
   
   Next, find the equivalent fraction of both fractional numbers with denominator 2880
2. For the 1st fraction, since 64 × 45 = 2880,
   70/64 = 70 × 45/64 × 45 = 3150/2880
3. Likewise, for the 2nd fraction, since 90 × 32 = 2880,
   4/90 = 4 × 32/90 × 32 = 128/2880
4. Add the two like fractions:
   3150/2880 + 128/2880 = 3150 + 128/2880 = 3278/2880
5. 3278/2880 simplified gives 1639/1440
6. So, 70/64 + 4/90 = 1639/1440
   In mixed form: 1199/1440

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