Answer:
20
Step-by-step explanation:
Well it is quite simple.You can find the 20% of 100 by multiplying 20 with 100 (wich means 20 yellow frogs,in this case within 100 frogs) and then diviting it with 100 (so it can be expressed as a
presentage that is based to 100).If you have any questions don't hesitate to contact me.
Yours sincerely,
Manos