SQL/MySQL/Math/TRUNCATE

Use TRUNCATE

/*
TRUNCATE function simply returns the supplied value X truncated to the 
number of decimal places equal to the supplied value D
*/

select TRUNCATE(113, -2);
select TRUNCATE(113, -1);
/*
mysql> select TRUNCATE(113, -2);
+-------------------+
| TRUNCATE(113, -2) |
+-------------------+
|               100 |
+-------------------+
1 row in set (0.00 sec)
mysql> select TRUNCATE(113, -1);
+-------------------+
| TRUNCATE(113, -1) |
+-------------------+
|               110 |
+-------------------+
1 row in set (0.00 sec)

*/