42.85...%
just divide 12 over 28 and you get a decimal. move the decimal point to the right two spaces, and that's your percent.
48%
9.6
12.5% = 1⁄8
It is: 12/20 times 100/1 = 60%
28%
48/28 simplified is12/71.714
56 percent.
9 dollars (without the aid of a calculator !)
The percent of 12 out of 42 is this: 12/100 x 42 = 0.12 x 42=5.04.
3/8
1/3
It is: 2/7