1.028 x 1/4:10%=2.84%:(0,6×1/5)=

1.028 x 1/4:10%=2.84%:(0,6×1/5)=

$1. : : 0.28 times frac{1}{4} div 10% = frac{28}{100} times frac{1}{4} div frac{10}{100} \ \ = frac{7}{25} times frac{1}{4} div frac{1}{10} = frac{7}{25} times frac{1}{4} times frac{10}{1} \ \ = frac{7}{5} times frac{1}{2} times frac{1}{1} = frac{7}{10}$

$2. : : 84% div (0.6 times frac{1}{5} ) = frac{84}{100} div ( frac{6}{10} times frac{1}{5} ) \ \ = frac{21}{25} div ( frac{3}{5} times frac{1}{5} ) = frac{21}{25} div frac{3}{25} = frac{21}{25} times frac{25}{3} \ \ = frac{7}{1} times frac{1}{1} = 7$