0.4 become 40 over 100 because we need to naive the decimal to ways to the right 3 over 10 become 3 and 1 over 10 because 3goes to 10 3 time and 1 is the left over and the 10 stays the same
17) 3/4 18) 1 & 1/2 19) 1 &1/4, 1.25 20) A because the number 0.125 is less than 1/4, thus point A is the only possible options (additionally point a represents 1/8 which is equivalent to 0.125)