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By how much is 80% of 40 greater than 54 of 25?
12
6
9
4
12
Convert percentages and fractions directly to numbers: 80% of 40=0.8×40=32, and 54×25=20. The difference is 32−20=12.
Evaluate 80% of 40 and 54 of 25, then find how much the first value is greater than the second.
Difference=(80% of 40)−(54 of 25)
Convert percentages and fractions directly to numbers: 80% of 40=0.8×40=32, and 54×25=20. The difference is 32−20=12.
Confusing the order of subtraction or miscalculating 54 of 25 as 25 instead of 20.
Calculate first expression
Find 80% of 40 by multiplying 0.8 with 40.
80%×40=10080×40=32
Calculate second expression
Find 54 of 25 by multiplying 54 with 25.
54×25=4×5=20
Find the difference
Subtract the second value from the first value to find how much greater it is.
32−20=12
A is correct because 80% of 40 is 32 and 4/5 of 25 is 20, and their difference is 32 - 20 = 12.
Always convert both percentages and fractions to decimals or integers before performing comparative subtraction to avoid calculation errors.
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