reduce the width of the "subscribe" button

we have "subscribe" button as here,

but we want to reduce the extra width and want to display as like in this

we are using same code in both

.footer .block-subscribe .actions {
    float: left;
    width: 34.375%;
    margin: 0;
}

.footer .block-subscribe .input-box {
    float: left;
    width: 65.625%;
    padding-top: 0;
}