A quiz consists of true and false questions. The ratio of the number of true questions to the number of false questions is 4:3. About what percent of the questions are false?

43% Percent of false questions = (3/7) *100 = 42.86. So, about 43% of the questions are false. Alternatively, one could reason out without any calculations as follows. For every 4 true questions, there are 3 false questions. So, there are fewer false questions than true ones, i.e., less than 50% of the questions are false. The only option is 43%.