One million jasmine flowers are needed to produce 1kg of of jasmine oil which is used in making perfume. How many jasmine flowers are needed for 1g of oil ?

1000000 = 1kg of oil = 1000g of oil

1000 = 1g of oil

1000 jasmine flowers are needed for 1g of oil.

Knowing simple latin would help you with this. ''Kilo'' means ''thousand'' in latin, so if something is prefixed by ''kilo'' and ''1'' it means that that there are one thousand of whatever ''kilo'' is refering to. This means there are 1000 grams in a kilogram, and if you need X to produce 1000g you need X/1000 to produce 1g. Hope this helped you understand, don't hesitate to ask further questions if there's something you wonder over.