1) What is the concentration of H+ ions in a solution of pH 1.3?
2) Now take .01 (1%) of that since the other 99% are neutralized
3) Convert back to pH
Confusing terminology but you should be able to do the above! Post if you need more help.
If 99% of an acidic solution's hydronium ions were neutralized, it means that it went from a 100% to 1% hydronium ions, in other word, the amount of hydronium ions is decreased by a factor of 100 (10^(-2)). Since pH is -log[H+], the pH is changed by 2 (-log(10^(-2))= 2). The pH will go up by 2.