(0.09 * 0.8) + (0.12 * 0.8) = ?
Multiply your answer by 100 to find the percent.
Last year 80% of a car service bill was for labour.
The rest was for parts.
This year the labour costs increased by 9%.
The cost for parts increased by 12%.
Work out the percentage increase in the total car service bill for this year.
1 answer