It’s the last option -> If a person is not in Japan, then the person does not live in Tokyo.
-25 15/19 + 9/1
get a common denominator of 19
they multiplied 9/1 * 19/19 = 171/19
-25 15/19 + 171/19 =
change the mixed number to an improper fraction
(19* 25 +15)/19 = 490/19
-490/19 + 171/19 =
add together
-319/19
now convert the improper fraction back to a mixed number
19* 16 =304 319-304=15
-319/19 =-16 15/19
Amount earned in one hour : 6.25
Amount needed to earn : 400
So, number of hours required for earning the required amount :
= Needed amount/Amount earned in an hour
= 400/6.25 = 64
