Does using Cash advance to make Part payment for housing loan help?

I got an offer for cash advance of Rs66000( 8.5% flat,48 EMIs @ 1843 a month). Please help in making a decision. Does it make sense to use this money to make a part payment for H.Loan(I have 6.4 lakh as outstanding) of 10.5%. My latest month 7214 EMI had interest of Rs. 5427 & principal of Rs.1787.
Please help in making a numerically provable decision.