Answer: 40 is 50 percent of 80

Assume the unknown value is 'Y'

40 = 50% x Y

40 = 50 100 x Y

Multiplying both sides by 100 and dividing both sides of the equation by 50 we will arrive at:

Y = 3 x 100 50

Y = 80%

Answer: 40 is 50 percent of 80

If you want to use a calculator, simply enter 40x100÷50 and you will get your answer which is 80

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Here is a calculator to solve percentage calculations such as 40 is 50 percent of what number. You can solve this type of calculation with your own values by entering them into the calculator's fields, and click *'Calculate'* to get the result and explanation.

Let's solve the equation for Y by first rewriting it as: **100% / Y = 50% / 40**

Drop the percentage marks to simplify your calculations: **100 / Y = 50 / 40**

Multiply both sides by Y to move Y on the right side of the equation: **100 = ( 50 / 40 ) Y**

Simplifying the right side, we get: **100 = 50 Y**

Dividing both sides of the equation by 50, we will arrive at: **80 = Y**

This leaves us with our final answer: **40 is 50 percent of 80**