Answer: For homework, Ari had to find 5% of $900. Did he do the work correctly?
A tape diagram. There are 5 parts out of a whole of 100. There are question mark parts out of a whole of 900.
Start Fraction part Over whole EndFraction = StartFraction 100 times 180 Over 5 times 180 End Fraction = StartFraction 18,000 Over 900 EndFraction
Are Ari’s calculations correct?
x No. Ari multiplied the denominators incorrectly.
✔ No. Ari should have written the percent ratio as StartFraction 5 Over 100 EndFraction
x No. Ari should have divided, not multiplied.
x Yes. Ari’s work is correct.