if i give you 30% of a triangle and give someone else 30% and give 30% to someone else what % is left..not 10%

Answer 1

When you give the first 30 %, 70 % is left
When you give 30% of that 70 % ,49% is left.
When you give 30% of the 49% , 34.3% is left.

Answer 2

originally you have 100%,
when you give 30% of that , you have the remaining 70%
from this 70 % when you give 30% i.e 21%
remaining is = 70-21 =49%
from this 49% you give 30% i.e 14.7%
remaining is = 49-14.7 = 34.3%l
finally left out is 34.3%