If a ounce is $150.00 how much is a gram

1 ounce= 28.349 523 125 grams

1 gram=$150 /  28.349 523 125

1 gram=$5.29

1 ounce =28.3495231 gram

Therefore price for 1 gram = 150/28.3495231 which is about $5.36

Notice this is approximated value. Same as Guest #1's answer.