43,75%

60%

153,75%

**** 

\(\frac{7}{16}=43,75\%\)

\(\frac{27}{45}=60\%\)

\(\frac{123}{80}=153,75\%\)

a)\(\frac{7}{16}=7:16=0,4375=43,75\%\)

b)\(\frac{27}{45}=27:45=0,6=60\%\)

c)\(\frac{123}{80}=123:80=1,5375=153,75\%\)

a=43,75%

b=60%

c=153,75%

Rút gọn:

\(\frac{18}{30}=\frac{18:6}{30:6}=\frac{3}{5}\)

\(\frac{36}{27}=\frac{36:9}{27:9}=\frac{4}{3}\)

\(\frac{64}{80}=\frac{64:16}{80:16}=\frac{4}{5}\)

\(\frac{45}{35}=\frac{45:5}{35:5}=\frac{9}{7}\)

bài dễ tự làm đi 

\(\frac{18}{30}=\frac{3}{5}\)

\(\frac{36}{27}=\frac{4}{3}\)

\(\frac{64}{80}=\frac{4}{5}\)

\(\frac{45}{35}=\frac{9}{7}\)

https://olm.vn/hoi-dap/question/1037641.html

Rút gọn các phân số sau :

\(\frac{18}{30}=\frac{18\div6}{30\div6}=\frac{3}{5}\)

\(\frac{64}{80}=\frac{64\div16}{80\div16}=\frac{4}{5}\)

\(\frac{36}{27}=\frac{36\div9}{27\div9}=\frac{4}{3}\)

\(\frac{45}{35}=\frac{45\div5}{35\div5}=\frac{9}{7}\)

\(\frac{18}{30}=\frac{3}{5}\)

\(\frac{64}{80}=\frac{4}{5}\)

\(\frac{36}{27}=\frac{4}{3}\)

\(\frac{45}{35}=\frac{9}{7}\)

a/ Đề sai

b/ \(\sqrt{125}-4\sqrt{45}+3\sqrt{2}-\sqrt{80}=5\sqrt{5}-12\sqrt{5}+3\sqrt{2}-4\sqrt{5}\)

\(=-11\sqrt{5}+3\sqrt{2}\)

c/ \(2\sqrt{\frac{27}{4}}-\sqrt{\frac{48}{9}}-\frac{2}{5}\sqrt{\frac{75}{16}}=2.\frac{3\sqrt{3}}{2}-\frac{4\sqrt{3}}{3}-\frac{2}{5}.\frac{5\sqrt{3}}{4}\)

\(=3\sqrt{3}-\frac{4\sqrt{3}}{3}-\frac{\sqrt{3}}{2}=\sqrt{3}\left(3-\frac{4}{3}-\frac{1}{2}\right)=\frac{7\sqrt{3}}{6}\)

d/ \(\left(\sqrt{99}-\sqrt{18}-\sqrt{11}\right)\cdot\sqrt{11}+3\sqrt{22}=33-3\sqrt{22}-11+3\sqrt{22}=22\)

7/16 = 43,75%

27/45 = 60%

123/80 = 153,75%

43,75%                            60%                                 153,75%

\(7:16=\frac{7}{16}=0,4375=43,75\%\)

\(27:45=\frac{3}{5}=0,6=60\%\)

\(123:80=\frac{123}{80}=1,5375=153,75\%\)

k minh nha