To subtract 11 81/100 from 4 3/10, you can first convert the mixed numbers to improper fractions:
11 81/100 = (11 * 100 + 81)/100 = 1181/100
4 3/10 = (4 * 10 + 3)/10 = 43/10
Now, subtract the two fractions:
(1181/100) - (43/10)
To subtract fractions, you need a common denominator. In this case, the common denominator is 1000.
So, convert both fractions to have a denominator of 1000:
(1181/100) = (1181/100) * (10/10) = 11810/1000
(43/10) = (43/10) * (100/100) = 430/1000
Now, you can subtract the fractions:
(11810/1000) - (430/1000) = 11380/1000
Simplify the fraction by dividing both the numerator and denominator by their greatest common divisor, which is 20:
(11380/20) / (1000/20) = 569/50
So, 11 81/100 - 4 3/10 = 569/50 as an improper fraction.