Given a fraction you can figure out the equivalent decimal:
FRACTION DECIMAL 3/4 .75 2/5 .4 1/10 .1 1/20 .05
.4 = 2/5 = 4/10 = 8/20 = 16/40 .5 = 1/2 = 2/4 = 4/8 = 5/10 .25 = 1/4 = 2/8 = 4/16 .75 = 3/4 = 6/8 = 12/16 .1 = 1/10 = 2/20 = 3/30
Now you get to try a few for yourself.