Help pls do not look it up thank you if u r here snog, pls help thx guys

Evan is incorrect.

Step-by-step explanation:

20 ÷ 25 =

0.8 =

0.8 × 100% =

80%;

Good luck buddy!

add all the numbers and check the ones place.

the answer is 486. as the ones place is more than 4, the estimation will be the next 10 ie, 490

b) 1/3 * 1/5

step-by-step explanation:

each smallest part is 1/15 since the written one is 1/5 and it's divided by 3 equal parts. (1/5 )/3 = 1/15 = 1/3 * 1/5