Use Math.floor to round the decimal places under the current value.
Reference
Example
Math.floor(1.0789 * 100) / 100
Working Fiddle
console.log(Math.floor(1.0789 * 100) / 100);
console.log(Math.floor(10.350 * 100) / 100);
console.log(Math.floor(1.7777 * 100) / 100);
console.log(Math.floor(12.34 * 100) / 100);