In a twoi digit number, the digit at tens place is 7 and the sum of the digit is 8 timed the digit at units palce. then the number is .
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If it the sum of the digits is seven, it could only be one of the following 2-digit numbers:
16
25
34
43
52
61
70
Now, out of these, which ones have a 10’s place that is “25% less” than the 1’s place? That means that it is 1/4 less, which is another way of saying it is 3/4 of the 1’s place.
This means it must be smaller than the 1’s place. So numbers 43-70 don't qualify, leaving us with the following candidates:
16
25
34
1 is 1/6, not 3/4, of 6. 2 is 2/5, not 3/4, of 5. But 3 is 3/4 of 4. So the answer is 34.
Tl;dr: 34.
hope it helps
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