3a^7/10b^10× 15b^3/12 a^5 ÷a^3/b^6

Question

3a^7/10b^10× 15b^3/12 a^5 ÷a^3/b^6

Answer 1

3a⁷/10b¹⁰ * 15b³/12a⁵ : a³/b⁶=(3a⁷ * 15b³ * b⁶) / (10b¹⁰ * 12a⁵ * a³)=(3*3*5*a⁷b⁹) / (2*5*3*4 * a⁸b¹⁰)=3/(8ab)