2.5X102
2.5 × 102or2.5E2
It is 21/250.
2.5 x 10^2 cm
Oh, dude, it's like super easy. So, to write 250 in standard form, you just move the decimal point two places to the left, which gives you 2.50 x 10^2. Ta-da! That's your standard form. Easy peasy, lemon squeezy.
250.0
3/250 = 0.012
250 is an integer.
250% is written (in reduced form) as: 2 1/2
243/250
11/250
7/250
19/250