a) \(\frac{33}{99} = \frac{1}{3}, \frac{150}{125} = \frac{6}{5}, \frac{25}{100} = \frac{1}{4}, \frac{14}{210} = \frac{1}{15}, \frac{150}{1000} = \frac{3}{20}, \frac{1000}{2500} = \frac{2}{5}, \frac{264}{148} = \frac{66}{37}\)
b) \(\frac{45}{630} = \frac{1}{14}, \frac{30}{64} = \frac{15}{32}, \frac{125}{500} = \frac{1}{4}, \frac{7}{217} = \frac{1}{31}, \frac{12}{600} = \frac{1}{50}, \frac{75}{300} = \frac{1}{4}, \frac{140}{210} = \frac{2}{3}\)