300000 all you had to do was round the number down after the 1 significant figure
you round down with 1,2,3,4
and round up with 5,6,7,8,9
so if it asked for 78453 to 2 significant figures you count the numbers and round after that so 78|453 and since 4 is the next number and it is less that 5 we round down which means it becomes 78000 with is lower than 78453
but if we had 0.0247 and it asked for this number to 2 significant figures all you need to do is count the SIGNIFICANT figures significant means anything with value so that is 1,2,3,4,5,6,7,8,9,10.... 0 has no value therefore we ignore 0 and start counting at the first figure larger than 0 if we go back to 0.0247 that would be the 2 so 2 significant figure of 0.0247 would equal 0.024|7 7 is larger than 5 so we round up to 0.025 tadaa i hope that helped
