+128707 express the following as a percentage a) 9 over 20 b) 3 out of 25
a) 9 / 20 = x / 100
cross-multiplying, we have
9 * 100 = 20 * x
900 = 20 * x Divide both sides by 20
45 = x
So........ 9 / 20 = 45 / 100 = 45%
b) 3 /25 = x /100
cross-multiplying, we have
3 * 100 = 25 * x
300 = 25 * x Divide both sides by 25
12 = x
So........ 3 / 25 = 12 / 100 = 12%
+118613 thanks Chris but you make this one look hard !
If you want to change a fraction to a percentage just multiply by 100 and put the % sign.
$$\frac{9}{20}\times 100\%\\\\
=\frac{9}{1}\times 5\%\\\\
=45\%$$
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$$\frac{3}{25}\times100\%\\\\
=\frac{3}{1}\times4\%\\\\
=12%$$
