Answer:
A, B, D
Step-by-step explanation:
40% is the same as the fraction 4/10.
Compare 4/10 with 3/20 (A):
LCM of 10 and 20 is 20, so make the denominators of all fractions to 20
We now have 8/20 and 3/20
Now you can just simply look at the numerators. 3 is obviously less than 8 so option A is less than 40%
Compare 4/10 with 23/100 (A):
LCM of 10 and 100 is 100, so make all denominators 100
Now compare 40/100 and 23/100
40>23 so 23/100 is less than 40%
Compare 4/10 with 3/5 (C):
We can further reduce 4/10 to 2/5, and conveniently it has the same denoninator as 3/5. 3 is NOT less than 2, so C is ruled out.
Compare 4/10 with 1/8 (D):
LCM of 10 and 8 is 40, so we'll use that as our denominator
We now have 16/40 and 5/40.
5 is less than 16, so we include D in our answer.
