Seven eighths of a number is 14. What is this number? Write a formula!

Seven eighths of a number is 14. What is this number? Write a formula!

14 ÷ 7 of 8 = 14 × 7 of 8 = 16

What is 7-8 of 10, 3-8 of 1

7-8 / 10-1 / 8
=7 / 10 - (3 / 8 + 1 / 8)
=7-1 / 10
=7-5 out of 10
=Two out of ten
=1 in 5

Three fifths of a number is nine out of twenty

Let this number be x, 3 / 5x = 9 / 20, then x = 9 / 20 * 5 / 3 = 3 / 4

1. 20% of a number is 11 less than 3 / 4 of it. 2. 1 / 4 of a number is equivalent to 20% of 2 / 5. This number is more

1、11/（3/4-20%）=11/（11/20）=20
2、（1/4）/（2/5）/（20%）/（2/5）=（1/4）*（5/2）*5*（5/2）=125/16

1. 20% of a number is 100. What is 3 / 5 of this number? 2. 5 / 8 of a number is 4 less than 20 1. 20% of a number is 100. What is 3 / 5 of this number? 2. 5 / 8 of a number is less than 4% of 20. What is this number

1、3/5/0.2*100=300
2、（20-4）/5*8=25.6

Formula calculation ① 5 of a number Six is three 4. What's the number? ② Eight threes The sum of 4 minus 3 5 divided by 2 What is the difference of quotient of 3? ③ 2 of a number 3 is 12, 5 of this number What's six? ④2 The product of 3 and a number is exactly 4 of 20 5, find this number? (solved by equation)

①3
4÷5
6=9
10；
A: the number is 9
10．
②8×3
4-3
5÷2
Three
=6-9
Ten
=51
10；
A: the difference is 51
10．
③12÷2
3×5
Six
=15×5
Six
=25
2；
A: 25
2．
④ Let this number be X
Two
3x=20×4
Five
Two
3x=16
 x=24；
A: the number is 24

Three fifths of a number is 12 more than 20 of this number?

Does 20 of this number mean 20 times?
If it is x * 3 / 5-20x = 12, then x = - 60 / 77 = - 0.78

-2,6, - 12,20, - 30... What's the rule of this group of numbers? What's the ninth number and what's the nth number?

These numbers are all negative and positive cycles;
If the symbol is ignored:
The first number is 1 * 2;
The second number is 2 * 3;
The third number is 3 * 4;
……
If the sign is taken into account, the law of the number is: (- 1) ⁿ· n (n + 1)
That is, the nth number is equal to the nth power of "- 1", and then multiplied by the product of N and (n + 1)

Add + or - in the middle of 3 / 2, 5 / 6, 7 / 12, 9 / 20, 11 / 30, 13 / 42, 45 / 56 to make the result equal to 1 + 1 / 8

3/2=1+1/2
5/6=1/2+1/3
7/12=1/3+1/4
9/20=1/4+1/5
11/30=1/5+1/6
13/42=1/6+1/7
15/5=1/7+1/8
So the answer is 3 / 2-5 / 6 + 7 / 12-9 / 20 + 11 / 30-13 / 42 + 15 / 56

3 / 4 of a number is 9 / 20. What is 5 / 12 of this number

9/20÷3/4x5/12
=3/5x5/12
=1/4
5 / 12 of this number is 1 / 4