Answers

Subtract 36/80 from 90/28

1^st number: 3 6/28, 2^nd number: 36/80

90/28 - 36/80 is 387/140.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 28 and 80 is 560
   
   Next, find the equivalent fraction of both fractional numbers with denominator 560
2. For the 1st fraction, since 28 × 20 = 560,
   90/28 = 90 × 20/28 × 20 = 1800/560
3. Likewise, for the 2nd fraction, since 80 × 7 = 560,
   36/80 = 36 × 7/80 × 7 = 252/560
4. Subtract the two like fractions:
   1800/560 - 252/560 = 1800 - 252/560 = 1548/560
5. After reducing the fraction, the answer is 387/140
6. In mixed form: 2107/140

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