Question

63 is 30% of what number?

21
93
210
300

Answer 1

210

Explanation:

Let number be x, 63 is 30% of x would be:

`\displaystyle{63 = (30)/(100)x}`

**30% = 30/100**

Solve the equation for x, multiply both sides by 100 to get rid of the denominator:

`\displaystyle{63 * 100= (30)/(100)x * 100} \\ \\ \displaystyle{6300 = 30x}`

Divide both sides by 30:

`\displaystyle{ (6300 )/(30)= (30x)/(30)} \\ \\ \displaystyle{ 210= x}`

Therefore, that number is 210. Hence, 63 is 30% of 210