Решение:

• в)
• $$\frac{15}{60} = \frac{15 \times 1}{15 \times 4} = \frac{1}{4}$$
• $$\frac{88}{33} = \frac{11 \times 8}{11 \times 3} = \frac{8}{3}$$
• $$\frac{2}{100} = \frac{2 \times 1}{2 \times 50} = \frac{1}{50}$$
• $$\frac{50}{100} = \frac{50 \times 1}{50 \times 2} = \frac{1}{2}$$