exam Maths Puzzle Numerical Ability

1/4x-2/7=1/2x+2

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Can someone please help me with this problem?

The price of a doll increased from $600 to $800. What was the percent of the increase? Round to the nearest tenth percent.

Thanks in advance for your help! A new device created by the local pet shop allows the owner to stomp on a lever to send the ball flying through the air. This device has become so popular that the council wants to