The problem is that your input data are already escaped:
{
"results": {
"overall": {
"score": 43.7,
"observedAverage": 50,
"potential": 64
},
"summary": "<p>...;"
}
}
This means you need to reverse it and unescape the first. See how this can be done using a simple custom helper
https://playground.jsreport.net/w/anon/iuEpjLvy