Question

a/3b*5b/7a/
/ - дробь

Answer 1

$cfrac{a}{3b} times frac{5b}{7a} = frac{a times 5b }{3b times 7a} = frac{5}{21}$

Answer 2

$frac{a}{3b} times frac{5b}{7a} = frac{5ab}{21ab} = frac{5}{21}$