Comparison between the quenched fractions obtained by methods 1 and 2 (left panel), methods 1 and 3 (middle panel), or methods 1 and 4 (right panel). The error bars are based on the Poissonian uncertainties on the number of quenched galaxies in the cluster and on the number of galaxies in the considered field-of-view. The background uncertainty included is estimated to 5% of the unscaled background subtraction since we adjusted the subtracted background by steps of 10%. Clusters that have quenching ratios above or below 1.5 times the standard deviation of are highlighted.