Seven squared is 49, or 49.0 in decimal form.
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7 squared can be expressed as a product of the same factor by multiplying 7 by itself. Therefore, 7 squared can be written as 7 x 7.
7
If you mean 7/15 then as a decimal it is 0.4'6' recurring '6'
0.07 is a decimal; fraction is 7/100.