round up nearest 0.10

Question

I need to round up to the nearest 0.10 with a minimum of 2.80

 var panel;
 if (routeNodes.length > 0 && (panel = document.getElementById('distance')))   
 {              
   panel.innerHTML = (dist/1609.344).toFixed(2) + " miles = £" + (((dist/1609.344 - 1) * 1.20) + 2.80).toFixed(2); 
 }

any help would be appreciated

Answer 1

var number = 123.123;

Math.max( Math.round(number * 10) / 10, 2.8 ).toFixed(2);