.multiple-list li {
    float: left;
    width: 33.33%;
}

.multiple-list {
    display: inline-block;
    width: 100%;
    float: left;
}
@media only screen and (max-width :991px) {
  .multiple-list li {
    float: left;
    width: 50%;
}  
}
@media only screen and (max-width :480px) {
  .multiple-list li {
    float: left;
    width: 100%;
} 
}