0ne tank is filling at a rate of 5/8 gallons per 7/10 a seconds tank s filing at rate of 5/9 gallon per 2/3 hour.

1. 1st tank = Fills at a rate of 5/8 gallons per 7/10 hour

2nd tank = fills at a rate of 5/9 gallons per 2/3 hours

=> Let’s solve which tank is working faster.

=> 1st tank

=> 5/8 gallons = 0.63 gallons

=> 7/10 hour = 0.7 hour

=> 0.63 / 0.7

=> 0.9 gallons / hr

=> 2nd tank

=> 5/9 gallon =.56 gallon

=> 2/3 hour = 0.67 hours

=>.56 /.67

=>.84 gallons/hr

The 1st tank is working faster.