Hey there!
To begin solving this problem, we have to know how many times greater is 45 when compared to 30.
To figure this out, we divide 45 by 30.
[tex] \frac{45}{30} [/tex]
This fraction can be simplified by dividing both the numerator and denominator by 15.
[tex] \frac{3}{2} [/tex]
Now, we can multiply this value by 4 gallons to get our answer.
[tex]\frac{3}{2} *4[/tex]
[tex]=6[/tex]
Thus, it would take 6 gallons of water to water the 45 plants.
This was a slightly simpler approach than dividing 4 gallons by 30 plants and then multiplying that by 45 plants, since 30 and 45 are quite large numbers and can be difficult to calculate mentally. However, both approaches reach the same answer.
Hope this helps! :)
~collinjun0827, Junior Moderator
