\(\frac{4}{5}+\frac{16}{5}:\frac{4}{55}\)
\(=\frac{4}{5}+\frac{16}{5}.\frac{55}{4}=\frac{4}{5}+11=\frac{4}{5}+\frac{55}{5}\)
\(=\frac{59}{5}\)
11/3:99/21-5/18 =11/3*21/99-5/18=7/9-5/18=15/18-5/18=10/18=5/9 4/5+16/5:4/55=4/5+16/5*55/4=4/5+44=4/5+220/5=224/5 26:13/17:34/7=26*17/13*34/7=34:34/7 =7