We review orders granting or denying a request for modification of a child support order for abuse of discretion. (Brothers v. Kern (2007) 154 Cal.App.4th

[74 Cal.Rptr.3d 288]

126, 133, 64 Cal.Rptr.3d 239; In re Marriage of Pearlstein (2006) 137 Cal.App.4th 1361, 1371, 40 Cal.Rptr.3d 910.) The trial court's exercise of its discretion must be "informed and considered" (In re Marriage of Mulolrow (1976) 61 Cal.App.3d 327, 332, 132 Cal.Rptr. 48; see In re Marriage of Pearlstein, at p. 1371, 40 Cal. Rptr.3d 910), and the trial court may not "ignore or contravene the purposes of the law" (County of Stanislaus v. Gibbs (1997) 59 Cal.App.4th 1417, 1425, 69 Cal.Rptr.2d 819).