Percent problems

The number of traffic accidents in the monitored cities changed year on year. It increased by $20\mathrm{\%}$ in city A and decreased by $1\mathrm{\%}$ in city B. Decide which of the following statements is correct: $$\begin{array}{l}\text{X: The same number of accidents occurred in city A as in city B the last year.}\\ \text{Y: There were more accidents in city A than in city B the last year.}\\ \text{Z: There have been fewer accidents in city B than in city A this year.}\end{array}$$