# What is 40 percent of 4200 (40% of 4200)?

Answer: 40 percent of 4200 is 1680

## Fastest method for calculating 40 percent of 4200 (40% of 4200)

Assume the unknown value is 'Y'

Y = 40 / 100

Y = 40 / 100 x 4200

Y = 1680

Answer: 40 percent of 4200 is 1680

If you want to use a calculator, simply enter 40÷100x4200 and you will get your answer which is 1680

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## Have time and want to learn the details?

Let's solve the equation for Y by first rewriting it as: 100% / 4200 = 40% / Y

Drop the percentage marks to simplify your calculations: 100 / 4200 = 40 / Y

Multiply both sides by Y to transfer it on the left side of the equation: Y ( 100 / 4200 ) = 40

To isolate Y, multiply both sides by 4200 / 100, we will have: Y = 40 ( 4200 / 100 )

Computing the right side, we get: Y = 1680

This leaves us with our final answer: 40% of 4200 is 1680