In a tank, 4/5 of the number of goldfish is 20% more than the number of swordtail.
(a) What fraction of the total number of fish in the tank is goldfish?
(b) What is the ratio of the number of goldfish to the number of swordtail in the tank?
(Give your answer in the simplest form).
chim...
Originally posted by kkhing:In a tank, 4/5 of the number of goldfish is 20% more than the number of swordtail.
(a) What fraction of the total number of fish in the tank is goldfish?
(b) What is the ratio of the number of goldfish to the number of swordtail in the tank?
(Give your answer in the simplest form).
a) If number of swordtails is 100%, 4/5 of number of goldfish is 120%.
So Number of goldfish is 150%.
Fraction of total number is goldfish = 150/250 = 3/5
b) Ratio of goldfish : swordtail = 3:2
4/5 of goldfish = (20%+100% ) of swordtail
100% of goldfish = 150% of swordtail
% ratio of goldfish to swordtail in terms of swordtail:
150%:100%
3:2
Thus 3/5 of fish in tank is goldfish.
What the world is coming to? -.-
in real life got ask liddat meh... wat 4/5 lah, 20% lah... just say how many fishes can liao mah.
See the topic and sub-forum =.=