p {
line-height:1.5;
margin-top: 10px;
text-align:justify;
font-size: 20px;
}
li{
    font-size: 20px;
}
td{
    vertical-align: middle;
}
tr{
    vertical-align: middle;
    /* height:180%; */
}

.frac {
    display: inline-block;
    position: relative;
    vertical-align: middle;
    letter-spacing: 0.001em;
    text-align: center;
}
.frac > span {
    display: block;
    padding: 0.1em;
}
.frac span.bottom {
    border-top: thin solid black;
}
.frac span.symbol {
    display: none;
}