There are green counters and white counters in a bag in the ratio 6:5 2 green counters are removed and 1 white counter is added to the bag, and the
ratio becomes 2 : 3.
Work out the original number of green counters in the bag.

Serena is making an experiment. for that, she needs 20 grams of a 52% solution of salt. she has two large bottles of salt water: one with 40% and the other with 70% of salt in them. how much of each must she use to make the solution she needs? i am in need of

I’m really confused and need to learn this

If bill bought a home for $210,000 and he sold it a year later for $120,000 his percentage of loss is