Assuming that "forth" is your fail at spelling fourth, it is 1.25
.25
.25
6.25
If you meant one fourth, then the answer is 0.25
0.25 inches
1 and 1/4 = 1.25
0.25. And just a small note, it is one-quarter not one forth.
.5 is the decimal version.
.75
5.75
1/4 of 1/6= 1/4 * 1/6= 1/24 in fraction= 0.0417 in decimal
hundred thousandths