Question

(10 3/5-9 1/4)*(2/3)²=
(6 4/5-5 3/4)*(4/7)²

Answer 1

$(10\frac{3}{5} -9\frac{1}{4} )*(\frac{2}{3} )^{2} =(10\frac{12}{20} -9\frac{5}{20} )*\frac{4}{9 }=1\frac{7}{20}*\frac{4}{9 }=\frac{27*4}{20*9} =\frac{3*1}{5*1} =\frac{3}{5}= 0,6$

$(6\frac{4}{5} -5\frac{3}{4} )*(\frac{4}{7} )^{2}=(6\frac{16}{20} -5\frac{15}{20} )*\frac{16}{49} =1\frac{1}{20} *\frac{16}{49} =\frac{21*16}{20*49} =\frac{3*4}{5*7} =\frac{12}{35}$