Answers

Subtract 70/90 from 56/20

1^st number: 2 16/20, 2^nd number: 70/90

56/20 - 70/90 is 91/45.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 90 is 180
   
   Next, find the equivalent fraction of both fractional numbers with denominator 180
2. For the 1st fraction, since 20 × 9 = 180,
   56/20 = 56 × 9/20 × 9 = 504/180
3. Likewise, for the 2nd fraction, since 90 × 2 = 180,
   70/90 = 70 × 2/90 × 2 = 140/180
4. Subtract the two like fractions:
   504/180 - 140/180 = 504 - 140/180 = 364/180
5. After reducing the fraction, the answer is 91/45
6. In mixed form: 21/45

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