Step-by-step explanation:
[tex] si = p \times \frac{r}{100} \times t[/tex]
[tex]si = 40 \times \frac{12}{100} \times \frac{5}{2}[/tex]
[tex]si = \frac{40 \times 12 \times 5}{100 \times 2} [/tex]
[tex]si = \frac{4 \times 12 \times 5}{10 \times 2} [/tex]
[tex]si = \frac{4 \times 12 }{5\times 2} [/tex]
[tex]si = \frac{2 \times 12}{5} [/tex]
[tex]si = \frac{24}{5} [/tex]
[tex]si = 4.8[/tex]
