Left: MIR AGN fractions in mergers and non-mergers for the SDSS sample (white background) and the GAMA sample (shadowed background). We also divide the GAMA sample into three redshift bins (denoted as G1, G2, G3). Right: OPT AGN fractions in mergers and non-mergers for the SDSS and GAMA sample. We also divide the GAMA sample into two redshift bins. Errors are calculated through binomial statistics. Bottom panels: ratio of AGN fraction in mergers relative to that in non-mergers (i.e., AGN excess) for the main merger sample and the stricter merger sample. The dashed lines indicate the excess value of one, which means no difference in the AGN fraction in mergers relative to non-mergers. We find a qualitatively consistent picture between the SDSS and GAMA samples in which the AGN fraction is higher in mergers compared to non-mergers.