First we’ll change 3 3/4. So you multiply the 4 in the denominator to the whole number 3 which equals 12. Then we add the three in the numerator to the 12 which equals 15. Now your new fraction is equal to 15/4. Now we can apply this to the other mixed fraction 1 1/2. Remember 2 times 1 =2 and then you add 1 equals 3/2.

Now that we have gotten the mixed fractions into fractions we can use, we need to find the common denominator so we can subtract one from the other. (15/4 – 3/2) = (15/4 – 6/4). Now we have 9/4.

Finally we need to find what 2/5 of 9/4 is. And that is quite easy because all you have to do is multiply the two fractions together, numerator times numerator (2×9) and denominator with denominator (5×4). Thus 2/5 times 9/4 is 18/20. Remember to reduce the fraction and you get 9/10.

I hope this helps.

3 3/4 – 1 1/2

You need to convert this so that you have a common denominator. Also, an improper fraction would help:

3 3/4 – 1 2/4

= 15/4 – 6/4

=9/4

Now you do 2/5 times 9/4, which is (2×9)/(5×4)=18/20, simplified is 9/10.

(3 3/4 – 1 2/4) (convert to common denominator)

=2 1/4

2/5 (or 0.4) of 2 1/4 (or 2.25,..9/4) then i used a calculator…which told me 0.9