Question

(b) (5/7)³×(21/25)². Answer is 45/7. But how did it come.​

Answer 1

Step-by-step explanation:

given (5/7)^3 * (21/25)^2

write 21 as 3*7 and 25 as 5^2

=(5/7)^3*((3*7)/(5^2))^2

=1/7*9/5(by cancelling 7^3 and 7^2 and cancelling 5^3 from 5^4)

=9/35