Question

(10%450)+(5%din200)-(7%din100)=?

Answer 1

$\frac{10}{100} 450=450:100*10=45 \\ \\ \frac{5}{100} 200=200:100*5=10 \\ \\ \frac{7}{100} 100=100:100*7=7 \\ \\ 45+10-7=48$

Answer 2

450 * 10/100 + 200 * 5/100 - 100 * 7/100 =
45 + 10 - 7 =
48