Answers

Subtract 21/25 from 90/40

1^st number: 2 10/40, 2^nd number: 21/25

90/40 - 21/25 is 141/100.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 40 and 25 is 200
   
   Next, find the equivalent fraction of both fractional numbers with denominator 200
2. For the 1st fraction, since 40 × 5 = 200,
   90/40 = 90 × 5/40 × 5 = 450/200
3. Likewise, for the 2nd fraction, since 25 × 8 = 200,
   21/25 = 21 × 8/25 × 8 = 168/200
4. Subtract the two like fractions:
   450/200 - 168/200 = 450 - 168/200 = 282/200
5. After reducing the fraction, the answer is 141/100
6. In mixed form: 141/100

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