if statement makes my program in javascript stop working

My code was working fine till I added the if statement. Any help is much appreciated.

function calc() {
   var a = parseInt(document.getElementById('eersteGetal').value); 
    var b = parseInt(document.getElementById('tweedeGetal').value); 
    var answer = parseInt(a + b);
    var quotient = a % b;
    var bigger = '';                                                
    if(a >= b) {                                
        bigger = "Number A is bigger";              
    } else if(a <= b) {                             
        bigger = "Number B is bigger";              
    } else(a === b) {                           
        bigger = "Number A en B are equal";     
    }
    var paragraaf = document.getElementById('answer'); 
    paragraaf.innerHTML = answer;
    var paragraafTwo = document.getElementById('quotient');  
    paragraafTwo.innerHTML = quotient;
    var paragraafThree = document.getElementById('bigger'); 
    paragraafThree.innerHTML = bigger;
}