6
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15/20 minus 6/20 which is 9/20 or 0.45
equivalent fraction of 3/10 = 6/20
0.5
1/2 of 3/101/2 * 3/103/20, or .15
There are 10 tenths in one whole, so to find out how many tenths make up two wholes, you would multiply 10 tenths by 2 wholes, which equals 20 tenths. Therefore, two wholes consist of 20 tenths.