maths questions????

1.)There are two containers of peanut oil, the normal size and the jumbo size.The volime of thr normal size is less than that of the jumbo size by 40% and the difference in volume is 600 mL.
(a.) Find the volume of the normal size.

Let the volume of the jumbo size container be x mL

So
x(40%) = 600
x(0.4) = 600
x = 1500

So the jumbo size container is 1500 mL.

The size of the normal size container
= 1500(100%-40%)
= 1500(60%)
= 1500(0.6)
= 900 mL

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(b.)If the volume of the normal size is increased by 5%,find its new volume.

The new volume
= 900*(100%+5%)
= 900(105%)
= 900(1.05)
= 945 mL

a) Assume normal is x, and jumbo is 1.4x
1.4x – x = 600
x = 1500 ml


b) 1500 (1 + 5%)
= 1575 ml