@media screen and (min-width: 480px) {
    img.screen {
        width: 55%
    }
}

@media screen and (min-width: 768px) {
    img.screen {
        width: 44%
    }
}

@media screen and (min-width: 1024px) {
    img.screen {
        width: 33%
    }
}