Answers

Subtract 70/64 from 84/90

1^st number: 84/90, 2^nd number: 1 6/64

84/90 - 70/64 is -77/480.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 90 and 64 is 2880
   
   Next, find the equivalent fraction of both fractional numbers with denominator 2880
2. For the 1st fraction, since 90 × 32 = 2880,
   84/90 = 84 × 32/90 × 32 = 2688/2880
3. Likewise, for the 2nd fraction, since 64 × 45 = 2880,
   70/64 = 70 × 45/64 × 45 = 3150/2880
4. Subtract the two like fractions:
   2688/2880 - 3150/2880 = 2688 - 3150/2880 = -462/2880
5. After reducing the fraction, the answer is -77/480

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