<prompt> In a person, total cholesterol is 300 mgdl. HDL is 25mgdl, TG150mgdl. What is the level of LDL choelsterol?2459512555  <response>: Friedwald equation: LDL Total Cholestrol - HDL- VLDL VLDL TG5 1505 30 LDL 300-25-30 300-55 245 mgdl Extra information: Ratio of TG to cholesterol in VLDL paicles is 5:1. That is the basis for this formula. Friedwald formula is reasonably accurate if test results are obtained on fasting plasma and if the TG level does not exceed 200 mgdL; by convention, it cannot be used if the TG level is 400 mgdL. 