22%=22/100
22% of 78= 22*78/100 = 1716/100 = 17.16
Explain how you could estimate 22% of 78 to check if your answer is reasonable.
3 answers
An exact answer is definitely not required.
20% is approximately a fifth (1/5)
78 is nearly 80
a fifth of 80 is 16
so the answer should be near 16
20% is approximately a fifth (1/5)
78 is nearly 80
a fifth of 80 is 16
so the answer should be near 16
check your answer show your work 68/4