Here, we are given the conversion rate for the Japanese Yen to the US dollars and asked to convert a certain amount in Japanese Yen to US dollars
From the question;
1000 japanese yen = 8 usd
So let 650 Yen = x usd
To get x, we have;
1000 * x = 650 * 8
1000x = 5200
divide both sides by 1000
x = 5200/1000
x = $5.20
Going by the conversion factor, 650 Yen will cost $5.20