Сократи дроби. а) 9/15; б) 36/120; в) 45/105; г) 180/900.

a) \frac{9}{15}= \frac{3*3}{3*5}= \frac{3}{5} \\b) \frac{36}{120} = \frac{12*3}{12*10}= \frac{3}{10} \\c) \frac{45}{105}= \frac{9*5}{21*5}= \frac{3*3}{3*7} = \frac{3}{7} \\d) \frac{180}{900}= \frac{10*9*2}{10*10*9}= \frac{2}{10}= \frac{2}{2*5}= \frac{1}{5}