20
20 = 1 x 20
100 = 5 x 20
Answer:

Step-by-step explanation:
Let x be the percentage then...

Start by dividing both sides by 4:

Simplify the fraction:

Then, multiply the fraction by 50/50, so we can get a number over 100 (that number would be the percentage). Note we can only multiply it by 50/50 since it is essentially multiplying the fraction by 1.

Answer:
Answer would be 89/100
Step-by-step explanation:
If 150g of fertilizer can cover 6 sq m of land then, 25 g of fertilizer can cover 1 sq m of land;
a)
For 13 sq m of land we need 25g*13
325g
b)
850g/25g=amount of land
34 sq m
Subtract the sum of the three test scores from the product of 75 and 5 and then divide the result by 2
hope this helps xoxo