CHANGE CHECKOUT TEXT BOTTOM

Give this a shot:

.woocommerce-cart .wc-proceed-to-checkout a.checkout-button {
    font-size: 17px;
}

Hi!

Thanks, and now how can i change text?

Thanks

Perhaps something like this will help?: http://shitalmarakana.com/change-proceed-checkout-add-cart-view-cart-button-text-woocommerce/

I saw the article but i don´t know where to suscribe tu change text.

Other question this code
.woocommerce-cart .wc-proceed-to-checkout a.checkout-button {
font-size: 17px;
}

I have to add in custom css? or in functions.php?

I added in custom css but don´t do nothing, it doesn´t running correctly.

Thanks

That's CSS. Can you link us to the page that's not working? Thanks!