Error returning values using $.getJSON

Question

I’m trying to make a page about data from covid-19! I’m trying to get the total number of dead from two different days using the following code:

var ontem = $.getJSON('https://covid19-brazil-api.now.sh/api/report/v1/brazil/2020' + mes.val() + '0' + diaAnt(), {"deaths": ""}).success(function(data) {
    var totais = data.data.reduce((a, b) => a + b.deaths, 0);
    return totais;
  })

var hoje = $.getJSON('https://covid19-brazil-api.now.sh/api/report/v1/brazil/2020' + mes.val() + dia.val(), function(data) {
      var totais = data.data.reduce((a, b) => a + b.deaths, 0)
        
});

The problem is that it always returns me the following data:

Object { readyState: 1, getResponseHeader: ƒ, getAllResponseHeaders: ƒ, setRequestHeader: ƒ, overrideMimeType: ƒ, … }

I’ve tried everything but I can’t get the exact amount. Can anyone help?

Edit.: What I want to do is subtract the value of the variable "today" with the variable "yesterday"

Answer 1

ontem and hoje are the objects that make the request, the returned data are available in the functions function(data) { /* faça qualquer coisa aqui */}

To wait for both answers use when

var ontem = $.getJSON('https://covid19-brazil-api.now.sh/api/report/v1/brazil/20200816', {"deaths": ""})
var hoje = $.getJSON('https://covid19-brazil-api.now.sh/api/report/v1/brazil/20200817');
var sub = $.when(ontem, hoje).done(
    function(dadosDeOntem, dadosDeHoje){
        debugger;
        /* faça tudo aqui */
    }
);
/* faça nada aqui */