To calculate three tenths minus one twentieth, first convert both fractions to have a common denominator. The common denominator for 10 and 20 is 20. Thus, three tenths (3/10) can be converted to 6/20. Now, subtract one twentieth (1/20) from six twentieths (6/20): 6/20 - 1/20 = 5/20. Simplifying this fraction gives you one quarter, or 1/4.
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3 and 7 tenths(3.7)
One hundred minus seven tenths is ninety-nine and three tenths. It is actually a fairly easy problem.
one and one tenth
1/3 minus 3/10 is 1/30.
It is: 3/10 = three tenths