Question

Credit cards are 0.76mm thick, how thick is stack of 10/3 credit cards piled one on top of the other ?

Answer 1

I am not sure if you typed the question correctly, or maybe I misunderstood:

10 credit cards stack is 7,6mm thin.

3 credit cards stack is 2,28 thin.

`(10)/(3)` credit cards stack is
`2(8)/(15)` mm thin.

Explanation:

0,76mm - single card

10 * 0,76 = 7,6 mm

3 * 0,76 = 2,28 mm

`(10)/(3) * 0,76 = (10)/(3) * (76)/(100) = (760)/(300) = 2 (160)/(300) = 2 (16)/(30) = 2 (8)/(15) mm`