Maths of the percentage - some difficult questions - (15)
It is given that 5a=4b. What percentage of b is a? What percentage of a is b?
2006-11-16 13:47:17 · 2 個解答 · 發問者 Edward 1 in 科學 ➔ 數學
It is given that 5a=4b.
What percentage of b is a?
a=(4/5)b
4/5*100%
=80%
What percentage of a is b?
b=(5/4)a
5/4*100%
=125%
2006-11-16 14:38:48 · answer #1 · answered by 小李飛刀 6 · 0⤊ 0⤋
5a=4b
a=4b/5
a=80% of b
4b=5a
b=5a/4
b=125% of a
2006-11-16 13:51:18 · answer #2 · answered by vegitou 7 · 0⤊ 0⤋