Question

21 3/5 is what percent of 40

Answer 1

Method 1:

`21(3)/(5)=(21\cdot5+3)/(5)=(108)/(5)\\\\\\\\\begin{array}{ccc}40&-&100\%\\(108)/(5)&-&p\%\end{array}\qquad\text{cross multiply}\\\\\\\\40p=(108)/(5)\cdot100\\\\40p=108\cdot20\\\\40p=2160\qquad\text{divide both sides by 40}\\\\\boxed{p=54}`

Answer: 21 3/4 is 54% of 40.

Method 2:

`((108)/(5))/(40)\cdot100\%=(108)/(5)\cdot(1)/(4)\cdot10\%=(108)/(2)\%=54\%`

Answer: 21 3/4 is 54% of 40.

Answer 2

21.6 is 54% of 40.

Explanation:

21.6 ÷ 40 = 0.54 = 54%