ա) 300/20 = 15/1 = 15
բ) 15/245 = 3/49
գ) 5/4 x 2/3 = 15/8
դ) 7/10 x 1/4 =28/10=14/5
ե) 37/100 x 1/2 = 74/100 = 37/50
զ) 7 ամբ. 1/2 : 18 ամբ. 9/16 = 15/2 : 297/16 = 240/594 = 120/297 = 40/99