Hi Andrea,

I see 249 as approximately 250 and 64 as approximately 65 so my first step is to estimate 249/64 by 250/65. 5 divides both the numerator and denominator so 250/65 = 50/13.

Now I know that 13 × 4 = 52 so 50/13 is approximately 52/13 = 4.

I hope this helps,
Harley