Animal species

Of 100 types of animals, 9/100 were discovered in ancient times, and 2/100 were discovered in the Middle Ages. Another 3/10
were discovered in the 1800s. What fraction of the 100 types of animals was discovered after the 1800s? Explain.

Correct answer:

x =  0.59

Step-by-step explanation:

a=9100=0.09 b=2100=150=0.02 c=310=0.3  x=1abc=10.090.020.3=59100=0.59



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