.iframe-wrap1 {
  position: relative;
  width: 100%;
  padding-top: 120%;
  overflow:auto; 
  -webkit-overflow-scrolling:touch;
  border:1px solid #ccc; 
}
.iframe-wrap1 iframe {
    position:absolute;
    top:0;
    left:0;
    width:100%;
    height:100%;
    border:none;
    display:block;
}

.iframe-wrap2 {
  position: relative;
  width: 100%;
  padding-top: 70%;
  overflow:auto; 
  -webkit-overflow-scrolling:touch;
  border:1px solid #ccc; 
}
.iframe-wrap2 iframe {
    position:absolute;
    top:0;
    left:0;
    width:100%;
    height:100%;
    border:none;
    display:block;
}