[tex] \frac{19}{20} - \frac{2}{3} - \frac{1}{3} [/tex]
[tex] = \frac{19 \times 3}{20 \times 3} - \frac{2 \times 20}{3 \times 20} - \frac{1 \times 20}{3 \times 20} [/tex]
[tex] = \frac{57}{60} - \frac{40}{60} - \frac{20}{60} = \frac{57 - 40 - 20}{60} [/tex]
[tex]{ \boxed{{ \tt = \frac{ - 3}{60} = > - 0.05}}}[/tex]
– — – — – — – — – — – — –
[tex]3 \frac{5}{8} - 1 \frac{1}{2} - 1 \frac{1}{4} [/tex]
[tex] = \frac{29}{8} - \frac{3}{2} - \frac{5}{4} [/tex]
[tex] = \frac{29}{8} - \frac{3 \times 4}{2 \times 4} - \frac{5 \times 2}{4 \times 2} [/tex]
[tex] = \frac{29}{8} - \frac{12}{8} - \frac{10}{8} = \frac{29 - 12 - 10}{8} [/tex]
[tex]{ \boxed{ \tt = \frac{7}{8}}}[/tex]
– — – — – — – — – — – — –
[tex]2 \frac{3}{4} - 75\%[/tex]
[tex] = \frac{11}{4} - \frac{75}{100} [/tex]
[tex] = \frac{11 \times 25}{4 \times 25} - \frac{75}{100} [/tex]
[tex] = \frac{275}{100} - \frac{75}{100} = \frac{275 - 75}{100} [/tex]
[tex] { \boxed{ \color{pink}{ \tt = \frac{200}{100} = > 2}}}[/tex]
– — – — – — – — – — – — –
[tex] \frac{10}{15} - 35\%[/tex]
[tex] = \frac{10}{15} - \frac{35}{100} [/tex]
[tex] = \frac{10 \times 20}{15 \times 20} - \frac{35 \times 3}{100 \times 3} [/tex]
[tex] = \frac{200}{300} - \frac{105}{300} = \frac{200 - 105}{300} [/tex]
[tex]{ \boxed{ \tt = \frac{95}{300} = > \frac{19}{60}}}[/tex]
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