Blue dotted flowers

Question

If there are 39900000 flowers, how many are blue at 1.8% and how many are dotted at 11.5%, how many are blue and dotted?

Answer 1

There are 39,900,000 flowers in total.

1.8% are blue. 1.8% equal 0.018 written as a proportion. 0.018*39,900,999 = 718,200 blue flowers.

11.5% are dotted. 11.5% = 0.115 written as a proportion. 0.115*39,900,000 = 4,588,500 dotted flowers.

Of the 11.5% of dotted flowers, 1.8% can be expected to be blue. Being blue and dotted are NOT mutually exclusive!

11.5% * 1.8% = 0.115 * 0.018 = 0.00207 = 0.207% of flowers are blue AND dotted.

0.00207*39,900,000 = 82,593 flowers have both features.