Fontsize in percent

Here are a listing of font-size in percent and there according pixel size.

    font-size: 77%; /* 12px */
    font-size: 71%; /* 11px */
    font-size: 83%; /* 13px */
    font-size: 89%; /* 14px */
    font-size: 95%; /* 15px */
    font-size: 65%; /* 10px */
    font-size: 63%; /* 10px 62-63*/