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15% of 80 is 60% of what number?

Sagot :

Let x be the required number.

[tex]15\text{ \% of 80 =}60\text{ \% of x}[/tex]

[tex]15\text{ \% }\times\text{ 80 =}60\text{ \% }\times\text{ x}[/tex]

[tex]\frac{15}{100}\text{ }\times\text{ 80 =}\frac{60}{100}\text{ }\times\text{ x}[/tex]

Using the cross-product method, we get

[tex]\frac{15\times80}{100}\times\frac{100}{60}=x[/tex][tex]x=20[/tex]

Hence 15% of 80 is 60% of 20.

The answer is 20.