<span>9/25 and 28/45 are both rather large numbers as denominators, so you can expect your LCD to be a bit large as well. the way i find the LCD is by trial and error. i take the biggest of the denominators and multiply it by low numbers (1, 2, 3, etc.) until i find one that works for both.
45*1 = 45, which 25 doesn't go into evenly 45*2 = 90, which when divided by 25, results in 3.6, aka not a whole number 45*3 = 135, which divided by 25 results in 5.4 45*4 = 180, which divided by 25 results in 7.2 45*5 = 225, which is promising because it ends with "25", and results in 9
so your LCD, which is divisible by both 45 and 25, is 225.</span>
if x is the number of lawns and 30 is how much he gets for each lawn, it would be 30x. And in this situation, it needs to be equal to or more than 180.
