How to pronounce 十成 in Cantonese (2 out of 3):

知道有十成機會他是一個騙子
And there's a 10% chance that he's a fraud.

Cantonese Sentence Breakdown

知道 zi1 dou3
know
jau6
also
again
十成 sap6 sing4
100 percent
機會 gei1 wui6
opportunity
to1
he or him
(used for either sex when the sex is unknown or unimportant)
(used before sb's name for emphasis)
(used as a meaningless mock object)
other
another
si6
is
一個 jat1 go3
a; one
騙子 pin3 zi2
swindler