Question

Juanito estimated that 31% of 517 is 204. Is his estimate reasonable? No, because his calculation should be 30% of 520. No, because his calculation should be 40% of 520. Yes, because his calculation should be 30% of 510. Yes, because his calculation should be 40% of 510

Answer 1

31% of 517 is 204..

To obtain the 31% of 517 we have to multiply 517 by the percentage in decimal form (divided by 100)

517 x (31/100)=

517 x 0.31 = 160.27

So, 31% of 517 is 160.27, not 204.

now, the options:

No, because his calculation should be 30% of 520. (520 x(30/100)= 156)

No, because his calculation should be 40% of 520. (520 x (40/100)= 208)

Yes, because his calculation should be 30% of 510. (510 x (30/100)= 153)

Yes, because his calculation should be 40% of 510​ (510 x (40/100) = 204)

Option D is the correct one.