Answers

Subtract 15/28 from 90/70

1^st number: 1 20/70, 2^nd number: 15/28

90/70 - 15/28 is 3/4.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 70 and 28 is 140
   
   Next, find the equivalent fraction of both fractional numbers with denominator 140
2. For the 1st fraction, since 70 × 2 = 140,
   90/70 = 90 × 2/70 × 2 = 180/140
3. Likewise, for the 2nd fraction, since 28 × 5 = 140,
   15/28 = 15 × 5/28 × 5 = 75/140
4. Subtract the two like fractions:
   180/140 - 75/140 = 180 - 75/140 = 105/140
5. After reducing the fraction, the answer is 3/4

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