[MUI] Text inside CircularProgress

MUI의 CircularProgress 안에 loading 글자 넣기

<Box display='flex' justifyContent='center' alignItems='center'>
    <CircularProgress/>
    <Typography position='absolute'>{99}%</Typography>
</Box>

참조
https://stackoverflow.com/questions/43420540/text-inside-circular-progress-of-material-ui