Answers

Subtract 21/40 from 20/9

1^st number: 2 2/9, 2^nd number: 21/40

20/9 - 21/40 is 611/360.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 9 and 40 is 360
   
   Next, find the equivalent fraction of both fractional numbers with denominator 360
2. For the 1st fraction, since 9 × 40 = 360,
   20/9 = 20 × 40/9 × 40 = 800/360
3. Likewise, for the 2nd fraction, since 40 × 9 = 360,
   21/40 = 21 × 9/40 × 9 = 189/360
4. Subtract the two like fractions:
   800/360 - 189/360 = 800 - 189/360 = 611/360
5. In mixed form: 1251/360

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