I think it's 7.8 but I did it in my head so don't stick to it totally
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decimal for 7/4 = 1.757/4:= 7 ÷ 4= 1.75 in decimal
7/4 as a decimal is 1.75
7 4/21 in decimal form is 7.190476 . . .
0.8
If that's 7 and 3/4 percent, the decimal is 0.0775