Percentage of material stripped from both Clouds during their mutual interaction. The dashed lines show the stripping fraction observed in the Magellanic system, computed by taking the ratio of H I and H II in the Stream vs. the total H I and H II mass in the two Clouds. Since the H II mass in the clouds is still largely unconstrained, we take several ionization fractions (listed under their corresponding line). We also assume that all the material in the Stream was originally in the Clouds. The circles show the stripping percentage in our simulations for different LMC–SMC mass ratios (given by the x-axis). Closed circles are simulations where the two clouds remain separate at the present day, and open circles are simulations where the clouds have already merged by the present day. The clouds would need to have an ionization fraction greater than 80% to match the stripping in our most aggressive simulation.