Question

the cost of mutton has increased in the ratio 9 ratio 7 in the original price was $5.60 per kg what is the new price​

Answer 1

Answer:

$\frac{9}{7} = \frac{x}{5.60} \\ 7x = 9 \times 5.60 \\ x = \frac{9 \times 5.60}{7} \\ = \frac{9 \times 560}{7 \times 100} \\ = \frac{9 \times 8}{10} \\ = \frac{72}{10} \\ = 7.2$