3/10 of 20 is shte same as 3/10 times 20.
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15/20 + 6/20 = 21/20 or 1 and 1/20
20/21
It is: 3/20
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.
Three and five tenths divided by three and four tenths is 1.0294.