D. Determine whether each is a proportion or not. Write YES or NO.
1. 4/5 and 8/9
2. 12/15 and 4/5
3. 8/10 and 4/6
4. 2/5 and 4/12
5. 15/20 and 5/6
1. 4/5 and 8/9
2. 12/15 and 4/5
3. 8/10 and 4/6
4. 2/5 and 4/12
5. 15/20 and 5/6
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Answer:
Step-by-step explanation:
Use cross multiplication to know if it is a proportion or not.
4 8
-- & --- = 4 × 9 =36 5 × 8 =40 (NOT PROPORTION)
5 9
______________________________
a c
a c-- & ----- = a × d & b × c
a c-- & ----- = a × d & b × c b d
(FORMULA, use this to memorise it)
Hope this helps:)
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