3.07
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If you mean: 7 and 45/100 then it is 7.45 as a decimal
8.7. A decimal point (the period in math) says that it's a decimal. A decimal is a fraction of the whole, expressed with the period and means tenths. So the number given is eight wholes and 7/10 of a whole.
think of it this way any numbers to ther right of the decimal is a whole so 3 wholes 7 thousandths 6 tenths and one unit
To find out how many one-fifths are in 7 wholes, you can multiply 7 by 5, because each whole contains 5 one-fifths. Thus, 7 wholes contain ( 7 \times 5 = 35 ) one-fifths. Therefore, there are 35 one-fifths in 7 wholes.