To calculate the percentage of an amount, turn the percentage into a fraction (by dividing by 100), then carry out the calculation:
38% of 420
= `frac(38)(100)` x 420
= 0.38 x 420
= 159.6
A saver ticket works out at 70% of the cost of a full price ticket. If a full price ticket is £130, what is the saver ticket price?
70% x 130
= `frac(70)(100)` x 130
= 0.7 x 130
= 91
Answer: £91
A car is purchased for £8000. Three years later it is sold for £6500. What percentage was the sold price compared to the original price? Give your answer to 2 significant figures.
The result can be worked out from:
`frac(text(sale price))(text(original price)) = frac(6500)(8000) = 0.8125`
Multiply by 100 to change the decimal to a percentage:
0.8125 x 100 = 81.25% = 81% (2sf)
Answer: 81%