30%=500 what is 100%

You can also use a unitary approach.

First calculate what 1% would be worth if 30% is 500. To do this, divide 500 by 30.

$${\frac{{\mathtt{500}}}{{\mathtt{30}}}} = {\frac{{\mathtt{50}}}{{\mathtt{3}}}} = {\mathtt{16.666\: \!666\: \!666\: \!666\: \!666\: \!7}}$$

Then calculate what 100% is worth. To do this, multiply the 1% value by 100.

$${\frac{{\mathtt{50}}}{{\mathtt{3}}}}{\mathtt{\,\times\,}}{\mathtt{100}} = {\frac{{\mathtt{5\,000}}}{{\mathtt{3}}}} = {\mathtt{1\,666.666\: \!666\: \!666\: \!666\: \!666\: \!7}}$$

Rounded off to the nearest whole number, this is 1667.

x/100 = 500/30       | * 100      | * 30

x * 30 = 500 * 100      | : 30

x = 50000/30

x = 5000/3 = 1666.6666666666666667

Use a ratio approach:

 

X/100 = 500/30

 

X = 100*500/30 

 

$$X=1666\frac{2}{3}$$