book Maths Puzzle Numerical Ability

i have a examine and i'm scared i'll fail cause my teacher didnt teach me how to do ratios rates and frations

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book Other Question

The sum of three consecutive integers is 969. What are the integers? A ROOM MEASURES 3M BY 4M BY 7M.
THE WALLS NEED 2 COATS OF PAINT. A 4-L CAN OF PAINT COVERS 40M SQUARED.
HOW MUCH PAINT SHOULD TANYA BUY?
I KNOW THE ANSWER BUT NOT HOW I GOT IT.