How do you write 12.4 million in numbers?

Answer 1

12,400,000.

If you know that 1 million in digits is 1,000,000, then you can replace that 1 with a 12, so you'll have 12,000,000.

The .4 in 12.4 lets you know that after the 12, you need to put a 4.

You wouldn't put 12.4,000,000 - instead the 4 takes the place of the 1 in 100,000.

Then you have 12,400,000.

Another way to say 12.4 million is 'twelve million, four hundred thousand.'