The cost of 12 pens is 6.36. Work out the cost of 9 pens

$6.36 Divided by 12 = $0.53
$0.53 X 9 = $4.77
Conclusion: 9 pens cost $4.77

I can't math right now

$4.77

If 12 pens cost 6.36, then each pen costs 6.36 ÷ 12 = 0.53, so 9 pens would cost 0.53 × 9 = 4.77. I actually double-checked it using https://icalculadoraonline.com.br/ — they’ve got all kinds of handy calculators in one place, perfect for quick math like this.

To work out the cost of 9 pens, you can first divide the cost of 12 pens by 12, which gives you the cost of one pen. Then, multiply that by 9. In this case, 6.36 ÷ 12 = 0.53 per pen. So, 0.53 × 9 = 4.77 for 9 pens. If you ever need quick help with calculations like this, https://calculatoradam.com/ has a wide range of tools to make math and finance problems a breeze!